Fixing type in build id for high end mac bots on fyi

Bug: 779631
Change-Id: Id4848d02863e3e1533171495f56041eb8c5ec347
Reviewed-on: https://chromium-review.googlesource.com/1014954Reviewed-by: Ashley Enstad <ashleymarie@chromium.org>
Commit-Queue: Emily Hanley <eyaich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551371}

testing/buildbot/chromium.perf.fyi.json

@@ -529,7 +529,7 @@
         "trigger_script": {
           "args": [
             "--multiple-trigger-configs",
-            "[{\"id\": \"build246-a9\"}, {\"id\": \"build247-a9\"}, {\"id\": \"build248-a9\"}, {\"id\": \"build249-29\"}, {\"id\": \"build250-a9\"}, {\"id\": \"build251-a9\"}, {\"id\": \"build252-a9\"}, {\"id\": \"build253-a9\"}, {\"id\": \"build254-a9\"}, {\"id\": \"build255-a9\"}, {\"id\": \"build256-a9\"}, {\"id\": \"build257-a9\"}, {\"id\": \"build258-a9\"}, {\"id\": \"build259-a9\"}, {\"id\": \"build260-a9\"}, {\"id\": \"build261-a9\"}, {\"id\": \"build262-a9\"}, {\"id\": \"build263-a9\"}, {\"id\": \"build264-a9\"}, {\"id\": \"build265-a9\"}, {\"id\": \"build266-a9\"}, {\"id\": \"build267-a9\"}, {\"id\": \"build268-a9\"}, {\"id\": \"build269-a9\"}, {\"id\": \"build270-a9\"}, {\"id\": \"build271-a9\"}]",
+            "[{\"id\": \"build246-a9\"}, {\"id\": \"build247-a9\"}, {\"id\": \"build248-a9\"}, {\"id\": \"build249-a9\"}, {\"id\": \"build250-a9\"}, {\"id\": \"build251-a9\"}, {\"id\": \"build252-a9\"}, {\"id\": \"build253-a9\"}, {\"id\": \"build254-a9\"}, {\"id\": \"build255-a9\"}, {\"id\": \"build256-a9\"}, {\"id\": \"build257-a9\"}, {\"id\": \"build258-a9\"}, {\"id\": \"build259-a9\"}, {\"id\": \"build260-a9\"}, {\"id\": \"build261-a9\"}, {\"id\": \"build262-a9\"}, {\"id\": \"build263-a9\"}, {\"id\": \"build264-a9\"}, {\"id\": \"build265-a9\"}, {\"id\": \"build266-a9\"}, {\"id\": \"build267-a9\"}, {\"id\": \"build268-a9\"}, {\"id\": \"build269-a9\"}, {\"id\": \"build270-a9\"}, {\"id\": \"build271-a9\"}]",
             "--multiple-dimension-script-verbose",
             "True"
           ],

tools/perf/core/perf_data_generator.py

@@ -1114,7 +1114,7 @@ NEW_PERF_RECIPE_FYI_TESTERS = {
         'gpu': '1002:6821'
       },
       'device_ids': [
-          'build246-a9', 'build247-a9', 'build248-a9', 'build249-29',
+          'build246-a9', 'build247-a9', 'build248-a9', 'build249-a9',
           'build250-a9', 'build251-a9', 'build252-a9', 'build253-a9',
           'build254-a9', 'build255-a9', 'build256-a9', 'build257-a9',
           'build258-a9', 'build259-a9', 'build260-a9', 'build261-a9',