[ios] Default use_xcode_clang to false for all builders.

Bug: 964650
Change-Id: I23109e8e3dbcacfe4a24611f5a3d5de29708a156
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1650236
Reviewed-by: Misha Efimov <mef@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#667733}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 0fc28f5201e13086c79e5b3fe8d7671afec78c1b
1 file changed