Reland "Use newer OSX SDK for iOS" This is a reland of 192da9d76fef6012245473c92b9dfcb607848e6a Re-land after OS upgrade to 10.15. Original change's description: > Use newer OSX SDK for iOS > > Based on http://crrev.com/c/2056465 > > Bug: chromium:1052887 > Change-Id: I2f76067883ff528ca45becd90dd3a6f71a507494 > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2059669 > Reviewed-by: Jamie Madill <jmadill@chromium.org> > Commit-Queue: Jamie Madill <jmadill@chromium.org> Bug: chromium:1052887 Change-Id: If5d5c9e5b2dbb3b56eedfd9060015721817f47cd Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2063040 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>