package/mmc-utils: bump version to 1.0

This is the first tagged version of the package, so replace commit SHA
with version tag.

Change log since last version bump:

  d8a8358a7207 mmc-utils: Pass key_mac buffer to rpmb_get_key()
  a23ad7875b89 mmc-utils: Start to use the generic print_usage function
  e769d44ecb77 mmc-utils: Introduce a generic print_usage function
  6586fa5535dc mmc-utils: Simplify and streamline print_help function
  ec75d4b3b671 mmc-utils: Remove unused adv_help member from struct Command

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>