Revision 419801

lang/php70: switch distfiles from bzip2 to xz

While here also:
- regenerate patches with make makepatch
- replace "sed" with proper ${SED}
- no longer mute ${INSTALL_DATA}

PR:          209881
Reported by: Piotr Kubaj <pkubaj@anongoth.pl>
Approved by: pi (mentor)