Allow choice of `install` program
Allow choice of `install` program

This permits the use of, *e.g.*, `ginstall` or `uu-install`.
jbcrail/coreutils,Arcterus/coreutils,wimh/coreutils,tempbottle/coreutils,keunwoo/coreutils,tempbottle/coreutils,uutils/coreutils,uutils/coreutils,Arcterus/coreutils,jbcrail/coreutils,Heather/coreutils,Heather/coreutils,kevgeniy/coreutils,ebfe/coreutils,keunwoo/coreutils,uutils/coreutils,ebfe/coreutils,wimh/coreutils,kevgeniy/coreutils