Apply std in front of swap in the correct place

Author: vogelsgesang

libcxx/include/__exception/exception_ptr.h

@@ -85,7 +85,7 @@ class _LIBCPP_EXPORTED_FROM_ABI exception_ptr {
   exception_ptr& operator=(const exception_ptr&) _NOEXCEPT;
   _LIBCPP_HIDE_FROM_ABI exception_ptr& operator=(exception_ptr&& __other) _NOEXCEPT {
     exception_ptr __tmp(std::move(__other));
-    std::swap(__tmp, *this);
+    swap(__tmp, *this);
     return *this;
   }
   ~exception_ptr() _NOEXCEPT;
@@ -107,7 +107,7 @@ class _LIBCPP_EXPORTED_FROM_ABI exception_ptr {
 };
 
 inline _LIBCPP_HIDE_FROM_ABI void swap(exception_ptr& __x, exception_ptr& __y) _NOEXCEPT {
-  swap(__x.__ptr_, __y.__ptr_);
+  std::swap(__x.__ptr_, __y.__ptr_);
 }
 
 #  if _LIBCPP_HAS_EXCEPTIONS