findmissing: common: Convert to use logging facility

With logging now set up, let's use the logging facility for status reports.

BUG=None
TEST=Run on GCE

Change-Id: I803dc2337fd0dd90963b6f45de0aa19d1c0c67f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2196217
Reviewed-by: Curtis Malainey <cujomalainey@chromium.org>
Commit-Queue: Guenter Roeck <groeck@chromium.org>
Tested-by: Guenter Roeck <groeck@chromium.org>
1 file changed