syscall: Add syscall_bsd.go to zsycall_freebsd_386.go
syscall: Add syscall_bsd.go to zsycall_freebsd_386.go

Revision: 5885c9d10f created syscall_bsd.go for code used
by Darwin and other *BSDs, which should have included
FreeBSD. mksyscall.sh to generate new zsyscall_freebsd_386.go.

Fixes issue 862.

R=golang-dev, adg
CC=golang-dev
http://codereview.appspot.com/1701048

Committer: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>

tav/go,tav/go,tav/go,tav/go,tav/go,tav/go,tav/go