Log Message:
tex-fontools{,-doc}: update to 2019.51625

- New tool in the fontools collection:
    - splitttc: splits an OpenType Collection file into separate fonts

- Changes in autoinst:
    - Added -mergeweights and -mergeshapes options
    - Improved parsing of fonts' widths and weights
    - Improved mapping of widths and weights to NFSS codes
    - Warn when installing fonts from multiple families
    - Added (simple) automatic recognition of sanserif and typewriter fonts
    - Added encoding files for T3 and TS3 to distribution
    - Bugs fixed:
        - always log results of font info parsing
        - -inferiors without value would gobble next option or argument
        - fixed error checking after calls to otfinfo