dev-lang/go: rework bootstrap logic to use dev-lang/go-bootstrap
This eliminates the need for the system-bootstrap USE flag. Once
dev-lang/go is installed, dev-lang/go-bootstrap can be depcleaned.
(change by williamh)
The original patch allowed go to be used to bootstrap itself once it was
installed, but that could lead to a situation where go-1.14 was being
used to bootstrap go-1.13 for example, and I'm not sure that would be a
good idea.
Signed-off-by: Mike Gilbert <floppym@gentoo.org>
Signed-off-by: William Hubbs <williamh@gentoo.org>