MPC: Update to 1.0.2
Clang: By default build GCC with C and C++ languages enabled only for Clang toolchains.
Subtargets: Update python3 version in condition.
Clang-3.4: install clang-analyzer stuff.
Clang-git: install clang-analyzer stuff.
Merge pull request #347 from Alexpux/develop

Various fixes