No color if not a terminal; see clang/lib/Driver/Tools.cpp:3200


git-svn-id: https://root.cern.ch/svn/root/trunk@49329 27541ba8-7e3a-0410-8455-c3a389f83636
Revert unintentional change compared to clang trunk.


git-svn-id: https://root.cern.ch/svn/root/trunk@49330 27541ba8-7e3a-0410-8455-c3a389f83636
Remove left-over diff.


git-svn-id: https://root.cern.ch/svn/root/trunk@49331 27541ba8-7e3a-0410-8455-c3a389f83636
Add patches to llvm + clang Makefiles that reduce the targets for ROOT.


git-svn-id: https://root.cern.ch/svn/root/trunk@49332 27541ba8-7e3a-0410-8455-c3a389f83636