Update documentation of colors on Status.

site/dev/testing/buildbot.md

Index: site/dev/testing/buildbot.md
diff --git a/site/dev/testing/buildbot.md b/site/dev/testing/buildbot.md
index 2f4a12fb532e651bfda4798fc5f6a88d6c38c433..ba975d6abfb422fda810e3bc32e7e55d7d719fd6 100644
--- a/site/dev/testing/buildbot.md
+++ b/site/dev/testing/buildbot.md
@@ -70,10 +70,14 @@ Status View
 
 The status view shows a table with builders, grouped by test type and platform,
 on the X-axis and commits on the Y-axis.  The cells are colored according to
-the status of the build for each commit: green indicates success, red indicates
-failure, light orange indicates an in-progress build, and white indicates that
-no build has started yet for a given revision. Commits are listed by author, and
-the branch on which the commit was made is shown on the very left.
+the status of the build for each commit:
+ - green: success
+ - orange: failure

[borenet, 2015/09/08 19:44:32]

It looks more red than orange to me, but I guess it doesn't matter much since
it's the only warm color up there.

+ - purple: exception (infrastructure issue)
+ - black border, no fill: build in progress
+ - blank: no build has started yet for a given revision
+Commits are listed by author, and the branch on which the commit was made is
+shown on the very left. A purple result will override an orange result.
 
 For more detail, you can click on an individual cell to get a summary of the
 steps which ran for that build.  You can also click one of the white bars at