Add missing -S to avoid invoking assembler unnecessarily.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209828 91177308-0d34-0410-b5e6-96231b3b80d8

test/Frontend/Weverything-and-remarks.cpp

@@ -4,7 +4,7 @@
 // flags to filter them. The handler in BackendConsumer::DiagnosticHandlerImpl
 // should not emitting diagnostics for unhandled kinds.
 
-// RUN: %clang -c -Weverything -O0 -o /dev/null %s 2> %t.err
+// RUN: %clang -c -S -Weverything -O0 -o /dev/null %s 2> %t.err
 // RUN: FileCheck < %t.err %s
 
 typedef __char32_t char32_t;