Add GPU FYI Linux Ozone builder.

testing/buildbot/chromium.gpu.fyi.json

 {
   "AAAAA1 AUTOGENERATED FILE DO NOT EDIT": {},
   "AAAAA2 See generate_buildbot_json.py to make changes": {},
   "Android Release (Nexus 5)": {
     "gtest_tests": [
       {
         "override_isolate_target": "angle_unittests",
         "swarming": {
           "can_use_on_swarming_builders": true,
           "cipd_packages": [
@@ skipping 2202 matching lines @@
   "GPU Mac Builder (dbg)": {},
   "GPU Win Builder": {},
   "GPU Win Builder (dbg)": {},
   "GPU Win x64 Builder": {},
   "GPU Win x64 Builder (dbg)": {},
   "Linux ChromiumOS Builder": {
     "additional_compile_targets": [
       "All"
     ]
   },
+  "Linux ChromiumOS Ozone Builder": {},
   "Linux Debug (NVIDIA)": {
     "gtest_tests": [
       {
         "args": [
           "--use-gpu-in-tests",
           "--test-launcher-retry-limit=0"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
@@ skipping 16218 matching lines @@
             {
               "gpu": "10de:104a",
               "os": "Windows-10-10586"
             }
           ]
         }
       }
     ]
   }
 }