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Enable universal iOS binaries for examples (#17357)

Updates all example projects to build as universal binaries that run on
both armv7 and arm64 now that we support both platforms on iOS.
C
Chris Bracken committed
c9d73d3a454ed018da2d6a205fc1983e9d8c03d1
Parent: 0a0e2b4
Committed by GitHub <noreply@github.com> on 5/7/2018, 9:13:40 PM