workaround for 'Xdebug breaks on access to class static property' (#654)
workaround for 'Xdebug breaks on access to class static property' (#654)

see https://github.com/docker-library/php/issues/133
AliveCorpse/laradock,dtunes/laradock,kolobai/laradock,olin2011/laradock,dtunes/laradock,yourivandenberg/laradock,AliveCorpse/laradock,kolobai/laradock,NewbMiao/laradock,ancon/laradock,Competa-IT/laradock,RafahCSilva/laradock,computerfr33k/laradock,hp9390/laradock,hnquang112/laradock,bestlong/laradock,vjekoslav/laradock,jfoliveira/laradock,hnquang112/laradock,RafahCSilva/laradock,bestlong/laradock,zuohuadong/laradock,jinnawat/laradock,Harmonic/laradock,viender/laradock,kolobai/laradock,arkadiusjonczek/laradock,Harmonic/laradock,yourivandenberg/laradock,macghriogair/laradock,computerfr33k/laradock,olegl-hyuna/laradock,a-h-abid/laradock,vjekoslav/laradock,cjnchk/laradock,springjk/laradock,computerfr33k/laradock,zuohuadong/laradock,olegl-hyuna/laradock,luciano-jr/laradock,emmac1016/laradock,springjk/laradock,viender/laradock,bestlong/laradock,cjnchk/laradock,ralphowino/laradock,ralphowino/laradock,arkadiusjonczek/laradock,hnquang112/laradock,bestlong/laradock,ancon/laradock,tharaxodia/laradock,a-h-abid/laradock,schiggi/laradock,yourivandenberg/laradock,hp9390/laradock,jcharlesworth/laradock,jinnawat/laradock,tharaxodia/laradock,hnquang112/laradock,jcharlesworth/laradock,NewbMiao/laradock,luciano-jr/laradock,arkadiusjonczek/laradock,cjnchk/laradock,edmundluong/laradock,emmac1016/laradock,springjk/laradock,zuohuadong/laradock,ralphowino/laradock,thorerik/laradock,ydatech/yii2-laradock,schiggi/laradock,viender/laradock,jinnawat/laradock,edmundluong/laradock,schiggi/laradock,zuohuadong/laradock,macghriogair/laradock,thorerik/laradock,ydatech/yii2-laradock,dtunes/laradock,jfoliveira/laradock,macghriogair/laradock,Harmonic/laradock,NewbMiao/laradock,olin2011/laradock,Competa-IT/laradock,LaraDock/laradock,jinnawat/laradock,schiggi/laradock,Harmonic/laradock,edmundluong/laradock,cjnchk/laradock,vjekoslav/laradock,arkadiusjonczek/laradock,bestlong/laradock,springjk/laradock,ralphowino/laradock