test: attempt to repair SCEI buildbots

The tests target ARM, ensure that the ARM target is registered.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@284156 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGenObjC/runtime-abi-match.m

@@ -1,4 +1,5 @@
 // RUN: %clang -target armv7-windows -fobjc-runtime=ios -O1 -fexceptions -S -emit-llvm %s -o - | FileCheck %s
+// REQUIRES: arm-registered-target
 
 void (*f)(id);
 void (*g)(void);