UPSTREAM: unit/test-uuid: Fix using strcmp

It is no longer guaranteed the string will match since bt_uuid_to_string
now always uses 128 Bits format to be consistent with the format used
over D-Bus.

(cherry picked from commit 1f2e03bc5262e412e822dec7c17a783c487c18cb)

BUG=chrome-os-partner:48794
TEST=manually

Change-Id: Iaf63c4cbc44b5d4994f4b50539d889310d89df18
Reviewed-on: https://chromium-review.googlesource.com/325184
Commit-Ready: Wei-Ning Huang <wnhuang@chromium.org>
Tested-by: Wei-Ning Huang <wnhuang@chromium.org>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-by: Miao-chen Chou <mcchou@chromium.org>
1 file changed