strings: Rename example to match function name.
strings: Rename example to match function name.

R=golang-dev, adg
CC=golang-dev
http://codereview.appspot.com/5729065

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

pombredanne/go-deleteme,gnanderson/go,dsriram/golang,gnanderson/go,apparentlymart/golang,gnanderson/go,pombredanne/go-deleteme,pombredanne/go-deleteme,gnanderson/go,dsriram/golang,tv42/old-go,tv42/old-go,gnanderson/go,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go,dsriram/golang,tv42/old-go,apparentlymart/golang,dsriram/golang,apparentlymart/golang,apparentlymart/golang,pombredanne/go-deleteme,dsriram/golang,tv42/old-go,pombredanne/go-deleteme,apparentlymart/golang,apparentlymart/golang,dsriram/golang,gnanderson/go,apparentlymart/golang,gnanderson/go,tv42/old-go,tv42/old-go,dsriram/golang