pkgsrc-wip: GDM + GNOME now runs on NetBSD

[Dan Cîrnaț <dan%alt.md@localhost>]

Good news! GDM and a minimal GNOME session can now be installed from pkgsrc-wip

Tested with:
- NetBSD 9.0 amd64 in VirtualBox
- PKGSRC_COMPILER=clang

Installation:
There are a number of outstanding issues. For now, MPROTECT needs to be 
disabled
for wip/gjs and wip/gnome-shell to build and run. Also, wip/mutter only 
builds with a pkgsrc
version of MesaLib (needs 'glesv2')

# sysctl -w security.pax.mprotect.enabled=0
# echo "security.pax.mprotect.enabled=0" >> /etc/sysctl.conf
# echo "PREFER_PKGSRC=MesaLib" >> /etc/mk.conf

The packages will pull a lot of dependencies. Some of them can be installed in
advance from binary repositories to save time. Ex. MesaLib, pulseaudio, 
dbus, gtk

# make -C /usr/pkgsrc/wip/gdm install
# make -C /usr/pkgsrc/wip/gnome-session install
# make -C /usr/pkgsrc/wip/gnome-shell install

After installation, enable the rc.d scripts for dbus and gdm
# cp /usr/pkg/share/examples/rc.d/dbus /etc/rc.d/
# cp /usr/pkg/share/examples/rc.d/gdm /etc/rc.d/
# echo "dbus=YES" >> /etc/rc.conf
# echo "gdm=YES" >> /etc/rc.conf


I'll be watching the mailing list and continue on improving the 
packages. Enjoy!
Dan