Avoid changing the uuid when creating file system

The conditional logic around $fs_uuid can be removed once
mke2fs supports the same values for the -U option as tune2fs.

BUG=chromium:706484
TEST=Built and booted an image on device and VM

Change-Id: I46f817d85807792e7ae51c2c6e326422383d2e43
Reviewed-on: https://chromium-review.googlesource.com/486148
Commit-Ready: Drew Davenport <ddavenport@chromium.org>
Tested-by: Drew Davenport <ddavenport@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed