[chirp_users] New Daily Build

[Build System]

Greetings,

A new daily build of CHIRP is available.  This includes changes made
directly to the tree yesterday, and may include additional features,
bug fixes, and/or bugs.  If you are interested in trying it, grab it
from the following location:

  http://trac.chirp.danplanet.com/chirp_daily/daily-20200516


A list of the changes included in this build (since the last daily)
follows:

Changes for Build #621
[Jim Unroe <rock.unroe at gmail.com>] [PX-777] Update Tuning Steps List for Puxing PX-777

This patch updates rf.valid_tuning_steps for the Puxing PX-777
to include 6.25 KHz and 12.5 KHz.

#7849