[arcmt] Fix the ARC migrator. -arcmt-modify requires running before the initialization of SourceManager
because it is going to modify the input file.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133323 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/ARCMT/atautorelease-check.m b/test/ARCMT/atautorelease-check.m
index 126642cd..6528f3e 100644
--- a/test/ARCMT/atautorelease-check.m
+++ b/test/ARCMT/atautorelease-check.m
@@ -1,4 +1,4 @@
-// RUN: arcmt-test -check-only -verify --args %s 
+// RUN: %clang_cc1 -arcmt-check -verify -triple x86_64-apple-darwin10 -fobjc-nonfragile-abi %s
 
 #if __has_feature(objc_arr)
 #define NS_AUTOMATED_REFCOUNT_UNAVAILABLE __attribute__((unavailable("not available in automatic reference counting mode")))