Allow argument reorder

Author: cltnschlosser

test/Driver/driver_migration.swift

@@ -1,4 +1,4 @@
 // RUN: %swiftc_driver -update-code -migrate-keep-objc-visibility -### %s 2>&1 | %FileCheck -check-prefix=CHECK-KEEP-OBJC %s
 
-// CHECK-KEEP-OBJC: -migrate-keep-objc-visibility
-// CHECK-KEEP-OBJC: -emit-remap-file-path {{.*}}.remap
+// CHECK-KEEP-OBJC-DAG: -migrate-keep-objc-visibility
+// CHECK-KEEP-OBJC-DAG: -emit-remap-file-path {{.*}}.remap