[LUCI] Experiment 10% prod to luci.

Bug: 790520
Change-Id: I048d774652366744e26b84aa2a4faa8b22567105
Reviewed-on: https://chromium-review.googlesource.com/1053090Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Zhiling Huang <hzl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557331}

infra/config/branch/cq.cfg

@@ -54,7 +54,7 @@ verifiers {
       }
       builders {
         name: "android_compile_dbg"
-        equivalent_to { bucket: "luci.chromium.try" percentage: 0 }
+        equivalent_to { bucket: "luci.chromium.try" percentage: 10 }
       }
       builders {
         name: "android_n5x_swarming_rel"