[Mesa-stable] Cherry-pick Baytrail commit to 10.6

[Mark Janes]

Hi Emil,

Can you please cherry-pick this commits to 10.6?  It fixes
spec.arb_program_interface_query.arb_program_interface_query-resource-query
on Baytrail.

commit 4ee69a97bb0af0cc216539c48b246ea2abf8f208
Author: Samuel Iglesias Gonsalvez <siglesias at igalia.com>
Date:   Wed May 13 12:18:31 2015 +0200

    mesa/main: validate name syntax for array variables only


Samuel/Tapani:  Do you have any idea why this fix would be specific to
Baytrail?