Add test case for r167619.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167621 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Driver/strictalign.c b/test/Driver/strictalign.c
new file mode 100644
index 0000000..e48c07c
--- /dev/null
+++ b/test/Driver/strictalign.c
@@ -0,0 +1,2 @@
+// RUN: %clang -### -mstrict-align %s 2>&1 | FileCheck %s
+// CHECK: -mstrict-align