install-dependencies should run installer exactly once on Debian and Fedora, as it already does on Arch, because running it four times in a row is disheartening and dumb. Also, drop support for Ubuntu 12.04 to avoid needing to run apt-get twice. Also, drop support for yum since F21 is about to hit EOL.
Created attachment 265936 [details] Patch
Comment on attachment 265936 [details] Patch Clearing flags on attachment: 265936 Committed r192683: <http://trac.webkit.org/changeset/192683>
All reviewed patches have been landed. Closing bug.