Add WebKit Linux - RandomOrder bot to chromium.fyi

This is a set of 2 CLs:

1. build CL - https://codereview.chromium.org/2384243005/
2. src CL (this one) - https://codereview.chromium.org/2404573002

BUG=652357

Review-Url: https://codereview.chromium.org/2404573002
Cr-Commit-Position: refs/heads/master@{#428474}
diff --git a/tools/mb/mb_config.pyl b/tools/mb/mb_config.pyl
index 8dc5bdc..ccf7cdf8 100644
--- a/tools/mb/mb_config.pyl
+++ b/tools/mb/mb_config.pyl
@@ -190,6 +190,7 @@
       'WebKit Linux - WPTServe': 'release_bot',
       'WebKit Mac - WPTServe': 'release_bot',
       'WebKit Win - WPTServe': 'release_bot_x86',
+      'WebKit Linux - RandomOrder': 'release_bot',
       'Win 10 Fast Ring': 'release_trybot',
       'Windows deterministic': 'release_bot_x86',
       'Windows Clang deterministic': 'clang_release_bot_minimal_symbols_x86',