Add copy of src/ios/build/bots/scripts to unbreak iOS Simulator bots.

BUG=webrtc:6934
TBR=ehmaldonado@webrtc.org

Review-Url: https://codereview.webrtc.org/2595173003 .
Cr-Commit-Position: refs/heads/master@{#15756}

PRESUBMIT.py

@@ -437,6 +437,7 @@ def _CommonChecks(input_api, output_api):
       black_list=(r'^base[\\\/].*\.py$',
                   r'^build[\\\/].*\.py$',
                   r'^buildtools[\\\/].*\.py$',
+                  r'^ios[\\\/].*\.py$',
                   r'^out.*[\\\/].*\.py$',
                   r'^testing[\\\/].*\.py$',
                   r'^third_party[\\\/].*\.py$',