[arcmt] In GC, clear redundant __strong's.

llvm-svn: 143886
diff --git a/clang/test/ARCMT/GC.h b/clang/test/ARCMT/GC.h
new file mode 100644
index 0000000..6202e47
--- /dev/null
+++ b/clang/test/ARCMT/GC.h
@@ -0,0 +1,5 @@
+
+@interface ExtInterface {
+  __strong ExtInterface *myivar;
+}
+@end