Add libclang hook 'clang_toggleCrashRecovery()', which provides a mechanism for a client to enable/disable CrashRecovery within libclang function calls.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127920 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/libclang.darwin.exports b/tools/libclang/libclang.darwin.exports
index 7614544..0bb4632 100644
--- a/tools/libclang/libclang.darwin.exports
+++ b/tools/libclang/libclang.darwin.exports
@@ -108,8 +108,8 @@
 _clang_getTypeDeclaration
 _clang_getTypeKindSpelling
 _clang_hashCursor
-_clang_isCursorDefinition
 _clang_isConstQualifiedType
+_clang_isCursorDefinition
 _clang_isDeclaration
 _clang_isExpression
 _clang_isInvalid
@@ -126,6 +126,7 @@
 _clang_reparseTranslationUnit
 _clang_saveTranslationUnit
 _clang_sortCodeCompletionResults
+_clang_toggleCrashRecovery
 _clang_tokenize
 _clang_visitChildren
 _clang_visitChildrenWithBlock