Stop button does not work for QNX binaries

Reproduces at least on x86_64 target (Intel NUC)

Steps to reproduce:

• Use QNX offline installer for qt 5.11.2
• This installs Qt Creator 4.6.2
• Setup QNX device and verify "Test" says it's ok
• Deploy Qt libraries to the QNX device
• Start some application with "Play" button
• Stop application with "Stop" button

Expected outcome:

• Application is stopped

Actual outcome:

• "Application Output" pane says "User requested stop. Shutting down..."
• Application is not stopped

Workaround:

• Connect to the device with ssh and use "kill" to kill the application