Implement clang_saveTranslationUnit(), which saves a translation unit
into a PCH/AST file.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111006 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/libclang.exports b/tools/libclang/libclang.exports
index 9b2d0ad..cdb04bc 100644
--- a/tools/libclang/libclang.exports
+++ b/tools/libclang/libclang.exports
@@ -93,6 +93,7 @@
 clang_isUnexposed
 clang_parseTranslationUnit
 clang_reparseTranslationUnit
+clang_saveTranslationUnit
 clang_setUseExternalASTGeneration
 clang_tokenize
 clang_visitChildren