Things should build fine without this (the default min version for
arm builds is macOS 11.0, and the default build already passes in
a sysroot), and at least on my system swiftshader builds fine
in an intel->arm cross build without this.

Change-Id: Id408a935f996bdf316d90f150531a4c5855a61f3
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/55628Tested-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Commit-Queue: Nico Weber <thakis@chromium.org>