Really work around iOS varying limit in GLPrograms test

Bug: skia:6627
Change-Id: I80142f5288e1c6f59f6add3a5a71ab90da90d3cc
Reviewed-on: https://skia-review.googlesource.com/18069
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed