Disable pointer_conversion_objc.swift

Author: atrick

test/SILOptimizer/pointer_conversion_objc.swift

@@ -1,6 +1,7 @@
 // RUN: %target-swift-frontend -module-name pointer_conversion -emit-sil -O %s | %FileCheck %s
 // REQUIRES: optimized_stdlib
 // REQUIRES: objc_interop
+// REQUIRES: radar38551973
 
 // Opaque, unoptimizable functions to call.
 @_silgen_name("takesConstRawPointer")
@@ -55,4 +56,4 @@ public func testOptionalArray() {
   // CHECK-NEXT: [[EMPTY:%.+]] = tuple ()
   // CHECK-NEXT: return [[EMPTY]]
 
-} // CHECK: end sil function '$S18pointer_conversion17testOptionalArrayyyF'
+} // CHECK-LABEL: end sil function '$S18pointer_conversion17testOptionalArrayyyF'