Log Message:
unifont: update to 12.1.01.

2019-05-11: Release 12.1.01
   * This release adds the new Reiwa Japanese era sign, added in
     Unicode 12.1.0.

   * Elizabeth Bettencourt contributed many Under ConScript Unicode
     Registry (UCSUR) scripts for the Plane 0 Private Use Area.

   * Some adjustments were made to Nandinagari and Nyiakeng Puachue
     Hmong scripts.  Full details are in the ChangeLog file.

   * Minor changes to source code, mainly to suppress warnings
     on more systems.