Add DESTDIR as argument for install
Brought to you by:
bpeterso
This allows install to filesystem that is not the current root (e.g. chroot, installation target media, etc)...
Note that the attached patch depends on the patch here:
https://sourceforge.net/tracker/?func=detail&aid=3294964&group_id=26187&atid=386394
sjinn-install-DESTDIR.patch