test/bench/go1: use raw string instead of string addition
to reduce compile time memory/stack usage.
Update issue 4970
$ go test -c ../test/bench/go1
before:
0.36user 0.07system 0:00.44elapsed 100%CPU
(0avgtext+0avgdata 540720maxresident)k
0inputs+19840outputs (0major+56451minor)pagefaults 0swaps
after:
0.33user 0.05system 0:00.39elapsed 100%CPU
(0avgtext+0avgdata 289936maxresident)k
0inputs+19864outputs (0major+29615minor)pagefaults 0swaps

And stack usage is reduced to below 1MiB.

R=golang-dev, r, dave
CC=golang-dev
https://codereview.appspot.com/7436050
misc/emacs: Add tab completion for godoc command, completing from known installed packages

R=golang-dev, adonovan, bradfitz, cw, patrick.allen.higgins, sameer, ugorji
CC=golang-dev
https://codereview.appspot.com/7373051

Committer: Alan Donovan <adonovan@google.com>