[go/perfbot-sheriff] Disable failing browse:media:pinterest:2018

Disabling system_health.memory_desktop/browse:media:pinterest:2018
on chromium.perf/linux-perf, which has been consistently failing
since Jan 20.

TBR=perezju@chromium.org

Bug: 924330
Change-Id: Ib1246c78256633be8b05c8974d14f846ea99d2a2
Reviewed-on: https://chromium-review.googlesource.com/c/1428080
Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: John Chen <johnchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625042}

tools/perf/expectations.config

@@ -293,6 +293,7 @@ crbug.com/869118 [ Linux ] system_health.memory_desktop/long_running:tools:gmail
 crbug.com/836447 [ ChromeOS ] system_health.memory_desktop/multitab:misc:typical24 [ Skip ]
 crbug.com/799734 [ Win ] system_health.memory_desktop/browse:media:tumblr [ Skip ]
 crbug.com/899887 [ Linux ] system_health.memory_desktop/browse:social:facebook_infinite_scroll:2018 [ Skip ]
+crbug.com/924330 [ Linux ] system_health.memory_desktop/browse:media:pinterest:2018 [ Skip ]
 
 # Benchmark: system_health.memory_mobile
 crbug.com/787001 [ Android_Webview ] system_health.memory_mobile/load:media:soundcloud [ Skip ]