Add 'linux-builder-perf' to mb_config.pyl

Bug: 828467
Change-Id: I26fea5488c36d930ef84990da3354ccc64c17aa5
Reviewed-on: https://chromium-review.googlesource.com/1187075Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#585642}

tools/mb/mb_config.pyl

@@ -365,7 +365,9 @@
       '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',
+      # TODO(crbug.com/828467): Remove 'Linux Builder Perf'
       'Linux Builder Perf': 'official_goma_perf',
+      'linux-builder-perf': 'official_goma_perf',
       'Mac Builder Perf': 'official_goma',
       # TODO(crbug.com/828472): Remove 'Win Builder Perf'
       'Win Builder Perf': 'official_goma_x86',