[clang][DebugInfo] Make property-auto-synth.m check LLVM IR

Check for lack of `setter` and `getter` attributes on `DIObjCProperty`

Author: Michael137

clang/test/DebugInfo/ObjC/property-auto-synth.m

@@ -1,12 +1,7 @@
-// FIXME: Check IR rather than asm, then triple is not needed.
-// RUN: %clang_cc1 -triple %itanium_abi_triple -S -debug-info-kind=limited %s -o - | FileCheck %s
-
-// CHECK: AT_APPLE_property_name
-// CHECK-NOT: AT_APPLE_property_getter
-// CHECK-NOT: AT_APPLE_property_setter
-// CHECK: AT_APPLE_property_attribute
-// CHECK: AT_APPLE_property
+// RUN: %clang_cc1 -emit-llvm -debug-info-kind=limited %s -o - | FileCheck %s
 
+// CHECK-NOT: setter
+// CHECK-NOT: getter
 
 @interface I1
 @property int p1;