move string helpers to libcros
The only project using these funcs is libcros, so move them to that
project to avoid having to create a small shared library for it.
BUG=chromium-os:29973
TEST=`cbuildbot {x86,amd64,arm}-generic-full` worked
Change-Id: I55c296408a014c919d2cd58b157e6ccbab98666f
Reviewed-on: https://gerrit.chromium.org/gerrit/25043
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
3 files changed
