PRESUBMITs.py, use LUCI for the optional GPU tests on Android

Also in roll scripts

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BUG=731979

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_vr;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: Ic160cb4fab54d32647da0df364891aa670cdaa65
Reviewed-on: https://chromium-review.googlesource.com/972634
Reviewed-by: Yuly Novikov <[email protected]>
Reviewed-by: Kenneth Russell <[email protected]>
Commit-Queue: Yuly Novikov <[email protected]>
Cr-Commit-Position: refs/heads/master@{#544640}
diff --git a/tools/roll_webgl_conformance.py b/tools/roll_webgl_conformance.py
index bdc9988..df4b8255 100755
--- a/tools/roll_webgl_conformance.py
+++ b/tools/roll_webgl_conformance.py
@@ -26,7 +26,7 @@
     "buildernames": ["linux_optional_gpu_tests_rel"]
   },
   {
-    "mastername": "master.tryserver.chromium.android",
+    "mastername": "luci.chromium.try",
     "buildernames": ["android_optional_gpu_tests_rel"]
   },
   # Include the ANGLE tryservers which run the WebGL conformance tests