cmd/ld: increase number of ELF sections
cmd/ld: increase number of ELF sections

On NetBSD a cgo enabled binary has more than 32 sections - bump NSECTS
so that we can actually link them successfully.

R=golang-dev, rsc
CC=golang-dev
http://codereview.appspot.com/6261052
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go