One of the problems libclang tests has running under Windows is memory
allocated in libclang.dll but being freed in the test executable, possibly
by a different memory manager. This patch exposes a new export function,
clang_free(), used to free any allocated memory with the same libclang.dll
memory manager that allocated the memory.

http://reviews.llvm.org/D10949

Reviewed by Reid Kleckner, Douglas Gregor.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241789 91177308-0d34-0410-b5e6-96231b3b80d8