comms/fldigi: Update to 4.1.19

N.B. C-Media and udev patched out for now as very Linux specific ATM

2021-06-24 dave-w1hkj <w1hkj@bellsouth.net>

4032048a8: Version 4.1.19
887420331: C-Media PTT support
8cdda8274: LNW macro tag
439cc2c9c: Notes
d396d4970: lower case tx

2021-05-01 John Phelps <kl4yfd@gmail.com>

d2efc4f77: Vestigial AFC fixes * Fix OFDM and 8PSK AFC jumping randomly to noise-signals