[CQ] Make gyp bot a blocking bot

BUG=chromium:474921
NOTRY=true
TBR=vogelheim@chromium.org, jochen@chromium.org, tandrii@chromium.org

Review-Url: https://codereview.chromium.org/2126793004
Cr-Commit-Position: refs/heads/master@{#37593}

infra/config/cq.cfg

@@ -37,9 +37,10 @@ verifiers {
         name: "v8_linux64_avx2_rel_ng_triggered"
         triggered_by: "v8_linux64_avx2_rel_ng"
       }
+      builders { name: "v8_linux64_gyp_rel_ng" }
       builders {
-        name: "v8_linux64_gyp_rel_ng"
-        experiment_percentage: 100
+        name: "v8_linux64_gyp_rel_ng_triggered"
+        triggered_by: "v8_linux64_gyp_rel_ng"
       }
       builders { name: "v8_linux64_rel_ng" }
       builders {