[libclang] Introduce clang_findReferencesInFile which accepts a cursor, a file,
and a callback and finds all identifier references of the cursor in the file.

rdar://7948304

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141277 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/libclang.exports b/tools/libclang/libclang.exports
index 89d4131..68c0ad5 100644
--- a/tools/libclang/libclang.exports
+++ b/tools/libclang/libclang.exports
@@ -42,6 +42,8 @@
 clang_equalRanges
 clang_equalTypes
 clang_executeOnThread
+clang_findReferencesInFile
+clang_findReferencesInFileWithBlock
 clang_formatDiagnostic
 clang_getArrayElementType
 clang_getArraySize