Introduce CXString type and associated functions clang_getCString() and clang_disposeString().
This abstraction will help us manage string memory for complex names that cross the C++/C boundary (e.g. ObjC methods, selectors). This patch also uses it in clang_getTranslationUnitSpelling (which I'm not sure is necessary). Will investigate later...since the extra malloc() can't hurt (for now).
Patch by John Thompson.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@86562
91177308-0d34-0410-b5e6-
96231b3b80d8