UPSTREAM:st/mesa: purge framebuffers when unbinding a context

This fixes pipe_surface "leaks".

BUG=b:120608010
TEST=CTS media tests passed

Change-Id: I205e738cf6d951544179cae71ecb2c3a2ca6f51c
Cc: 18.3 <mesa-stable@lists.freedesktop.org>
Acked-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-on: https://chromium-review.googlesource.com/1436166
Commit-Ready: Benjamin Gordon <bmgordon@chromium.org>
Tested-by: Drew Davenport <ddavenport@chromium.org>
Reviewed-by: Deepak Sharma <deepak.sharma@amd.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
1 file changed