There's no reason for this to be separated, regardless of the
support status of i386 macOS builds. Additional architectures may
appear in the future (and currently there's actually 3 - i386,
x86_64, and x86_64h for Haswell CPUs). So this feature could be
used to get combined generic x86_64 and Haswell builds. Some
system libraries appear to have an x86_64h slice in Sierra.
[ChangeLog][Build System] Support for universal binaries on macOS
has been re-introduced.
Change-Id: I1c89904addf024431fdb3ad03ea8ab85da7240ad
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Jake Petroules <jake.petroules@qt.io>