More documentation on the module map language.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177704 91177308-0d34-0410-b5e6-96231b3b80d8
OpenMP threadprivate directive parsing and semantic analysis

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177705 91177308-0d34-0410-b5e6-96231b3b80d8