CMakeProjectManager: Ensure that toolchain paths are last

Task-number: QTCREATORBUG-3959
Change-Id: I93a19af8309933a51d26f94980088c0f244cc84f
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>
Android: Prepend $$PWD to paths to ANDROID_EXTRA_LIBS

Task-number: QTCREATORBUG-11868

Change-Id: I3d3e559d7d5d58efb5b28bc29b71fa812cee277c
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
AndroidExtraLibsModel: Use QDir::cleanPaths() for entries

Change-Id: Ie429b3e04d933663e9f6a883048ab75851ca63cd
Reviewed-by: Daniel Teske <daniel.teske@digia.com>