add package_ios.py to ios_bin

Change-Id: I749e4fe8887f84a943cbef2c49971195ef381508
Reviewed-on: https://skia-review.googlesource.com/7980
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
diff --git a/infra/bots/ios_bin.isolate b/infra/bots/ios_bin.isolate
index 0e67b04..524dad2 100644
--- a/infra/bots/ios_bin.isolate
+++ b/infra/bots/ios_bin.isolate
@@ -4,6 +4,7 @@
       'variables': {
         'files': [
           '../../platform_tools/ios/bin/',
+          '../../gn/package_ios.py',
         ],
       },
     }],