[libclang] Introduce a new function to apply the indexing callbacks on an existing
CXTranslationUnit, mainly to be used for indexing a PCH.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@144623 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/libclang.exports b/tools/libclang/libclang.exports
index 93cfb47..870f84c 100644
--- a/tools/libclang/libclang.exports
+++ b/tools/libclang/libclang.exports
@@ -142,6 +142,7 @@
 clang_index_isEntityObjCContainerKind
 clang_indexLoc_getCXSourceLocation
 clang_indexLoc_getFileLocation
+clang_indexSourceFile
 clang_indexTranslationUnit
 clang_isAttribute
 clang_isConstQualifiedType