Use hermetic toolchain on Mac, except for local iOS builds
Copied from https://chromium.googlesource.com/chromium/src/+/d04b06a98/build_overrides/build.gni
BUG=chromium:763924
Review-Url: https://codereview.webrtc.org/3013003002
Cr-Commit-Position: refs/heads/master@{#19781}
diff --git a/.gn b/.gn
index 2fe0610..7591ffb 100644
--- a/.gn
+++ b/.gn
@@ -25,7 +25,8 @@
# These are the list of GN files that run exec_script. This whitelist exists
# to force additional review for new uses of exec_script, which is strongly
# discouraged except for gypi_to_gn calls.
-exec_script_whitelist = build_dotfile_settings.exec_script_whitelist
+exec_script_whitelist = build_dotfile_settings.exec_script_whitelist +
+ [ "//build_overrides/build.gni" ]
default_args = {
# Webrtc does not support component builds because we are not using the
