Remove WITHOUT_PROFILE=1 for the dvd1.iso medium.

Requested by:	hrs
MFC after:	3 days
X-MFC-With:	r258310
Sponsored by:	The FreeBSD Foundation
Simplify PKG_ABI for pkg-stage.sh.

Submitted by:	hrs
MFC after:	3 days
X-MFC-With:	r258310
Sponsored by:	The FreeBSD Foundation