Fix failing -verify tests due to change in Clangs static_assert message.

Clang recently changed the way it outputs static assert diagnostics.
This patch fixes libc++'s -verify tests so they tolerate both the old
and new message format.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@313499 91177308-0d34-0410-b5e6-96231b3b80d8

test/libcxx/utilities/memory/util.smartptr/util.smartptr.shared/function_type_default_deleter.fail.cpp

@@ -36,7 +36,7 @@ int main() {
     SPtr<2> s2(getFn<2>(), Deleter{}); // OK
     SPtr<3> s3(nullptr, Deleter{}); // OK
   }
-  // expected-error@memory:* 2 {{static_assert failed "default_delete cannot be instantiated for function types"}}
+  // expected-error-re@memory:* 2 {{static_assert failed{{.*}} "default_delete cannot be instantiated for function types"}}
   {
     SPtr<4> s4(getFn<4>()); // expected-note {{requested here}}
     SPtr<5> s5(getFn<5>(), std::default_delete<FnType<5>>{}); // expected-note {{requested here}}