Log Message:
Update to 1.4.2.1. Changes since 1.4.0.1:

Added support for 14 bit EX processors: PIC16F1777/8/9 PIC16F18857 PIC16F18877
More predefined constants in the gpasm.
Added the missing DEBUG config option to many processors.
Improve the check that Flex is more recent than version 2.5.4.
Let "--list-chips" adapt to available screen width.
The inc and lkr files are synced with MPLABX 3.15