libchromeos: Add Get{User,Root}Path.

BUG=chromium-os:20778, chromium-os:16681
TEST=None yet

Change-Id: I211274b2abe961ae60a3402d5dd67fc2e7a5d21d
Signed-off-by: Elly Jones <ellyjones@chromium.org>
Reviewed-on: http://gerrit.chromium.org/gerrit/8571
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
3 files changed