Set the Objc tests to not run on windows.

PiperOrigin-RevId: 166705717
diff --git a/src/test/java/com/google/devtools/build/lib/rules/objc/BUILD b/src/test/java/com/google/devtools/build/lib/rules/objc/BUILD
index 00620ee..f83cddb 100644
--- a/src/test/java/com/google/devtools/build/lib/rules/objc/BUILD
+++ b/src/test/java/com/google/devtools/build/lib/rules/objc/BUILD
@@ -73,6 +73,7 @@
 java_test(
     name = "ObjcRulesTests",
     shard_count = 20,
+    tags = ["no_windows"],
     test_class = "com.google.devtools.build.lib.AllTests",
     runtime_deps = [
         ":ObjcRulesTests_lib",