Add presubmit to commit queue.

This should prevent CLs failing presubmit checks from landing.

Bug: angleproject:3288
Change-Id: I7d4ee56bd2cbe0089248d1737275aaeac8394d96
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1551839
Reviewed-by: Jamie Madill <jmadill@chromium.org>

infra/config/global/commit-queue.cfg

@@ -34,6 +34,10 @@ config_groups {
       builders {
         name: "angle/try/mac-rel"
       }
+      builders {
+        name: "angle/try/presubmit"
+        disable_reuse: true
+      }
       builders {
         name: "angle/try/win-clang-x64-dbg"
       }