Replace vulcan building with 'heroku run'#45

okko wants to merge 2 commits intomchung:mastermchung/heroku-buildpack-wordpress:masterfrom

frc:package_php-from-vulcan-to-herokurun-for-upstreamfrc/heroku-buildpack-wordpress:package_php-from-vulcan-to-herokurun-for-upstreamCopy head branch name to clipboard