devel/mold is now ported to NetBSD

[PHO <pho%cielonegro.org@localhost>]

Hi all,

Today I ported devel/mold, which only worked on Linux until now, to 
NetBSD. It is arguably the fastest and the least memory-consuming linker 
known to mankind :)

A few problems that I found have been patched and upstreamed, but there 
can still be some unknown issues on NetBSD. So please try it if you are 
interested.

You can try it by adding the following two lines to your etc/mk.conf:

LD=       /usr/pkg/bin/mold
LDFLAGS+= -Wl,-L/usr/lib