QtCreator project part: extended Linux detection.

Should fix potential "Cannot recognize platform" errors.

QtCreator (qmake build system) have 'specs' to select platform and compiler, typical spec name look like `linux-g++-64`, `unsupported/linux-clang`, `win32-msvc-2010` and so on. New platform condition uses more precise detection with `*linux-*` instead of just `linux`, it fixes issue that I previously found on some QtSDK version.