mesa: Upgrade 17.3.6 -> 17.3.7

mesa: Upgrade 17.3.6 -> 17.3.7

This version has been published at March 21, 2018, and it is a bugfix
only release. It includes several important fixes that were made as
part of 18.0.0 development cycle.

Full list of bug fixes can be see online at:

 https://www.mesa3d.org/relnotes/17.3.7.html

(From OE-Core rev: 3601c079e15f3570b9b90cd8775e4e90175d1bb5)

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>