[libc++abi] Use proper calling convention for TLS destructor

This is needed when using Windows threading.

git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@310329 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/cxa_exception_storage.cpp b/src/cxa_exception_storage.cpp
index eaac217..c641e02 100644
--- a/src/cxa_exception_storage.cpp
+++ b/src/cxa_exception_storage.cpp
@@ -56,7 +56,7 @@
     std::__libcpp_tls_key key_;
     std::__libcpp_exec_once_flag flag_ = _LIBCPP_EXEC_ONCE_INITIALIZER;
 
-    void destruct_ (void *p) {
+    void _LIBCPP_TLS_DESTRUCTOR_CC destruct_ (void *p) {
         __free_with_fallback ( p );
         if ( 0 != std::__libcpp_tls_set ( key_, NULL ) )
             abort_message("cannot zero out thread value for __cxa_get_globals()");