AST: Treat inline function declarations in -fms-compatibility as if it were in C++ when in C mode

This essentially fixes PR16766.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@187586 91177308-0d34-0410-b5e6-96231b3b80d8
Fix typo in comment.

Thanks Artyom Skrobov!


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@187588 91177308-0d34-0410-b5e6-96231b3b80d8