buildbot8 uses default.css, rather than buildbot.css -- fixing this for buildbot8 would be very invasive, so just use the new name.
buildbot8 uses default.css, rather than buildbot.css -- fixing this for buildbot8 would be very invasive, so just use the new name.

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@101690 0039d316-1c4b-4281-b951-d872f2087c98

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