Log Message:
MesaLib: update to 18.2.5.

18.2.1 Release Notes / September 21, 2018

Mesa 18.2.1 is a bug fix release which fixes bugs found since the 18.2.0
release.

18.2.2 Release Notes / October 5, 2018

Mesa 18.2.2 is a bug fix release which fixes bugs found since the 18.2.1
release.

18.2.3 Release Notes / October 19, 2018

Mesa 18.2.3 is a bug fix release which fixes bugs found since the 18.2.2
release.

18.2.4 Release Notes / October 31, 2018

Mesa 18.2.4 is a bug fix release which fixes bugs found since the 18.2.3
release.

18.2.5 Release Notes / November 15, 2018

Mesa 18.2.5 is a bug fix release which fixes bugs found since the 18.2.4
release.