Adding QNX labels

QNX-x86 target added for Linux. Armv7 and x86 targets added for Windows.

Change-Id: I70ee40f7e52c86ae52866ca23b2ed0502cf5bded
Reviewed-by: Sergio Ahumada <sahumada@blackberry.com>
Reviewed-by: Samuli Piippo <samuli.piippo@digia.com>