Qt 5.4 fails to start on Blackberry Playbook and later due to mixed up "blackberry" and "qnx" strings

When running Qt 5.4.x on a Blackberry Playbook then the app crashes with the following message during start:

Info: Action: Launch
Info: Launching com.example.untitledbb.testDev__untitledbb4e6ee476...
result::24674464
Info: done
Failed to open uom pps, errno=2
Failed to open region pps, errno=2
QFactoryLoader::QFactoryLoader() checking directory path "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins/platforms/libqminimal.so"
Found metadata in lib /apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins/platforms/libqminimal.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.2",
"MetaData":

Unknown macro: { "Keys"}

,
"className": "QMinimalIntegrationPlugin",
"debug": false,
"version": 328705
}

Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins/platforms/libqoffscreen.so"
Found metadata in lib /apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins/platforms/libqoffscreen.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.2",
"MetaData":

Unknown macro: { "Keys"}

,
"className": "QOffscreenIntegrationPlugin",
"debug": false,
"version": 328705
}

Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins/platforms/libqqnx.so"
Found metadata in lib /apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins/platforms/libqqnx.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.2",
"MetaData":

Unknown macro: { "Keys"}

,
"className": "QQnxIntegrationPlugin",
"debug": false,
"version": 328705
}

Got keys from plugin meta data ("qnx")
QFactoryLoader::QFactoryLoader() checking directory path "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native" ...
QFactoryLoader::QFactoryLoader() looking at "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/bar-descriptor.xml"
QElfParser: '/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/bar-descriptor.xml' is not an ELF object
"'/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/bar-descriptor.xml' is not an ELF object"
not a plugin
QFactoryLoader::QFactoryLoader() looking at "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/blackberry-tablet-default-icon.png"
QElfParser: '/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/blackberry-tablet-default-icon.png' is not an ELF object
"'/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/blackberry-tablet-default-icon.png' is not an ELF object"
not a plugin
QFactoryLoader::QFactoryLoader() looking at "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/untitledbb"
"Plugin verification data mismatch in '/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/untitledbb'"
not a plugin
QFactoryLoader::QFactoryLoader() checking directory path "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins" ...
QFactoryLoader::QFactoryLoader() checking directory path "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins/platforms/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins/platforms/libqminimal.so"
Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins/platforms/libqoffscreen.so"
Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/apps/com.example.untitledbb.testDev__untitledbb4e6ee476/native/plugins/platforms/libqqnx.so"
Got keys from plugin meta data ("qnx")
This application failed to start because it could not find or load the Qt platform plugin "blackberry".

Available platform plugins are: minimal (from app/native/plugins/platforms), offscreen (from app/native/plugins/platforms), qnx (from app/native/plugins/platforms), minimal, offscreen, qnx.

Reinstalling the application may fix this problem.

The problem is that the "qnx" and "blackberry" strings (see http://doc-snapshot.qt-project.org/qt5-5.4/qsysinfo.html) are mixed up for loading the appropriate blackberry platform plugin.

When replacing all "qnx" occurences in the sources with "blackberry" then Qt 5.4 loads fine.