Add -fmodules-autolink/-fno-modules-autolink (defaults to on) so that
users can explicitly enable/disable modules autolinking.

llvm-svn: 172592
diff --git a/clang/test/Modules/autolink.m b/clang/test/Modules/autolink.m
index e1a240b..8dce12b 100644
--- a/clang/test/Modules/autolink.m
+++ b/clang/test/Modules/autolink.m
@@ -1,5 +1,5 @@
 // RUN: rm -rf %t
-// RUN: %clang_cc1 -emit-llvm -o - -fmodule-cache-path %t -fmodules -F %S/Inputs -I %S/Inputs %s | FileCheck %s
+// RUN: %clang_cc1 -emit-llvm -o - -fmodule-cache-path %t -fmodules -fmodules-autolink -F %S/Inputs -I %S/Inputs %s | FileCheck %s
 
 @import autolink.sub2;