More MB fixes in preparation for flipping Linux bots to use MB.

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 b3fbae9277c34fae6d53bf2e886f2beeeb897388..b660074a928245dd492e9047c0c3ff7bb38cefa0 100644
--- a/tools/mb/mb_config.pyl
+++ b/tools/mb/mb_config.pyl
@@ -158,7 +158,7 @@
 
     'goma': {
       'gn_args': 'use_goma=true goma_dir="$(goma_dir)"',
-      'gyp_defines': 'goma=1 gomadir=$(goma_dir)',
+      'gyp_defines': 'use_goma=1 gomadir=$(goma_dir)',
     },
 
     'gpu_tests': {
@@ -298,7 +298,7 @@
       'linux_chromium_gn_rel': 'gn_release_bot',
     },
     'tryserver.chromium.linux': {
-      'linux_full_bisect_builder': 'swarming_gyp_release_trybot',
+      'linux_full_bisect_builder': 'swarming_gyp_release_bot',
       'linux_chromium_compile_rel_ng': 'swarming_gyp_release_trybot',
       'linux_chromium_rel_ng': 'swarming_gpu_tests_gyp_release_trybot',
       'linux_chromium_gn_rel': 'gn_release_trybot',