Add an options parameter to clang_saveTranslationUnit, because we'll want it later

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111016 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/libclang.exports b/tools/libclang/libclang.exports
index cdb04bc..a1e114a 100644
--- a/tools/libclang/libclang.exports
+++ b/tools/libclang/libclang.exports
@@ -17,6 +17,7 @@
 clang_defaultEditingTranslationUnitOptions
 clang_defaultDiagnosticDisplayOptions
 clang_defaultReparseOptions
+clang_defaultSaveOptions
 clang_disposeCodeCompleteResults
 clang_disposeDiagnostic
 clang_disposeIndex