Force off clang for GPU FYI release bots.

tools/mb/mb_config.pyl

Index: tools/mb/mb_config.pyl
diff --git a/tools/mb/mb_config.pyl b/tools/mb/mb_config.pyl
index 7d0095ad82ebb3ce3d66c016862429c591c3a73e..ec7550a4dbb81faf0defb8ca6cb6570f3a88e51c 100644
--- a/tools/mb/mb_config.pyl
+++ b/tools/mb/mb_config.pyl
@@ -1234,11 +1234,13 @@
     ],
 
     'gpu_tests_deqp_gles_release_trybot': [
-      'gpu_fyi_tests', 'release_trybot',
+      # TODO(thakis): Remove no_clang once https://crbug.com/727437 is fixed.
+      'gpu_fyi_tests', 'release_trybot', 'no_clang',
     ],
 
     'gpu_tests_deqp_gles_release_trybot_x86': [
-      'gpu_fyi_tests', 'release_trybot', 'x86',
+      # TODO(thakis): Remove no_clang once https://crbug.com/727437 is fixed.
+      'gpu_fyi_tests', 'release_trybot', 'x86', 'no_clang',
     ],
 
     'gpu_tests_debug_trybot': [
@@ -1595,6 +1597,10 @@
       'gn_args': 'is_clang=true',
     },
 
+    'no_clang': {
+      'gn_args': 'is_clang=false',
+    },
+
     'cronet': {
       'gn_args': ('disable_file_support=true disable_ftp_support=true '
                   'enable_websockets=false use_platform_icu_alternatives=true '