ProjectExplorer: Do not prepend compiler path to PATH everywhere!
Do not unconditionally prepend the (c++) compiler path to PATH for all projects using GCC-derived toolchains. Prepend the compiler path in the Qmake- and GenericBuildConfigurations instead. Also change the order: Apply buildconfiguration's addToEnvironment first, only then apply the kit's addToEnvironment. This does change a few things: * CMake and Qbs will now get the normal PATH * MSVC compilers will have their compiler path prepended to PATH by the effected BuildConfigurations. This should be harmless, since that happens before the environment setup script is appended. Task-number: QTCREATORBUG-18714 Change-Id: I548182bc447d80d24f4de4ce7cf12ee1a753ed26 Reviewed-by: Eike Ziller <firstname.lastname@example.org>