prevent unnecessary empty meta-packages for platform package install
prevent unnecessary empty meta-packages for platform package install

puteulanus/heroku-buildpack-php,a2service/heroku-buildpack-php,flant/heroku-buildpack-php,puteulanus/heroku-buildpack-php,flant/heroku-buildpack-php,rs-makino/buildpack-test,heroku/heroku-buildpack-php,thecsea/heroku-buildpack-php-with-ioncube,heroku/heroku-buildpack-php,createmultimedia/heroku-buildpack-php,rs-makino/buildpack-test,dzuelke/heroku-buildpack-php,rikur/heroku-buildpack-php,martijngastkemper/heroku-buildpack-php,rs-makino/buildpack-test,thecsea/heroku-buildpack-php-with-ioncube,dzuelke/heroku-buildpack-php,rs-makino/buildpack-test,createmultimedia/heroku-buildpack-php,alzheic/heroku-buildpack-aop,emeth-/heroku-buildpack-php,heroku/heroku-buildpack-php,emeth-/heroku-buildpack-php,puteulanus/heroku-buildpack-php,alzheic/heroku-buildpack-aop,jayelkaake/heroku-buildpack-magento,heroku/heroku-buildpack-php,dzuelke/heroku-buildpack-php,thecsea/heroku-buildpack-php-with-ioncube,rs-makino/buildpack-test,martijngastkemper/heroku-buildpack-php,rikur/heroku-buildpack-php,createmultimedia/heroku-buildpack-php,jayelkaake/heroku-buildpack-magento,rikur/heroku-buildpack-php,alzheic/heroku-buildpack-aop,rikur/heroku-buildpack-php,flant/heroku-buildpack-php,a2service/heroku-buildpack-php,emeth-/heroku-buildpack-php,a2service/heroku-buildpack-php,0ppy/sample-buildpack,emeth-/heroku-buildpack-php,rs-makino/buildpack-test,jayelkaake/heroku-buildpack-magento,0ppy/sample-buildpack,0ppy/sample-buildpack