Windows: windeployqt reports "Unable to find the platform plugin." for `-release -force-debug-info` builds

windeployqt fails to deploy an application built against a version of Qt configured with `-release -force-debug-info`. It reports "Unable to find the platform plugin."

Digging into the windeployqt code, I believe this is because the readPeExecutable function believes the binary is a debug binary and not a release binary. windeployqt correctly prints "application.exe 32 bit, release executable" so it is trying to do a deployment in release mode. However, when it goes to find the qwindows.dll platform plugin, and passes it into the findSharedLibraries function (https://qt.gitorious.org/qt/qttools/source/dac2cd7b261bd7e9b4af094ca53919fbc6da51c1:src/windeployqt/utils.cpp#L111), readPeExecutable is reporting that the binary is a debug binary, which doesn't match with the isDebugIn flag and therefore the function returns an empty result.