Add 'android-builder-perf' to mb_config

This is causing failure in https://logs.chromium.org/logs/chrome/buildbucket/cr-buildbucket.appspot.com/8937935288322083600/+/steps/generate_build_files/0/stdout

Bug: 828444
Change-Id: I7643fed1efd9ee12d4854dc1aec54a137818604c
Reviewed-on: https://chromium-review.googlesource.com/1179615Reviewed-by: Ned Nguyen <nednguyen@google.com>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#584107}

tools/mb/mb_config.pyl

@@ -358,6 +358,7 @@
       'Android arm64 Builder Perf': 'official_goma_minimal_symbols_android_arm64',
       'Android Compile Perf': 'official_goma_minimal_symbols_android',
       'Android arm64 Compile Perf': 'official_goma_minimal_symbols_android_arm64',
+      'android-builder-perf': 'official_goma_minimal_symbols_android',
       'Linux Builder Perf': 'official_goma_perf',
       'Mac Builder Perf': 'official_goma',
       # TODO(crbug.com/828472): Remove 'Win Builder Perf'