V8 Buildbot: Update mail notifier for x87.
V8 Buildbot: Update mail notifier for x87.

TBR=Hablich, zhengxing.li, chunyang.dai

Review URL: https://codereview.chromium.org/1594423003

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@298296 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build