Allow GPU acceleration on Linux with AMD Brahma drivers

BUG=719213
TEST=manual
R=magchen@chromium.org

Change-Id: I259ec8e0db3d586b9cbd9bd025c874a8930d31bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1980558Reviewed-by: Maggie Chen <magchen@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727313}

gpu/config/software_rendering_list.json

@@ -46,7 +46,7 @@
     {
       "id": 5,
       "description": "ATI/AMD cards with older drivers in Linux are crash-prone",
-      "cr_bugs": [71381, 76428, 73910, 101225, 136240, 357314],
+      "cr_bugs": [71381, 76428, 73910, 101225, 136240, 357314, 719213],
       "os": {
         "type": "linux"
       },
@@ -69,6 +69,9 @@
         },
         {
           "driver_vendor": ".*ANGLE.*"
+        },
+        {
+          "driver_vendor": ".*Brahma.*"
         }
       ],
       "features": [