Fix typo in CQ config

TBR=machenbach@chromium.org

No-Try: true
Bug: chromium:747960
Change-Id: Id8f1992889f19144ce489ed6fc4858b3aea4e778
Reviewed-on: https://chromium-review.googlesource.com/840009Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50276}

infra/config/cq.cfg

@@ -74,7 +74,7 @@ verifiers {
       builders { name: "v8_linux_mips64el_compile_rel" }
       builders { name: "v8_linux_mipsel_compile_rel" }
       builders { name: "v8_linux_nodcheck_rel_ng" }
-      buildrs {
+      buildres {
         name: "v8_linux_nodcheck_rel_ng_triggered"
         triggered_by: "v8_linux_nodcheck_rel_ng"
       }