update readability-identifier-naming-objc test to use interface ivar. Implementation ivars are not supported in 32-bits OS.

Reviewers: alexfh, chandlerc

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D45936

llvm-svn: 330562

clang-tools-extra/test/clang-tidy/readability-identifier-naming-objc.m

@@ -3,10 +3,7 @@
 // RUN:  [{key: readability-identifier-naming.ObjcIvarPrefix, value: '_'}]}' \
 // RUN: --
 
-@interface Foo
-@end 
-
-@implementation Foo {
+@interface Foo {
     int _bar;
     int barWithoutPrefix;
     // CHECK-MESSAGES: :[[@LINE-1]]:9: warning: invalid case style for objc ivar 'barWithoutPrefix' [readability-identifier-naming]