add gdb 13.2, 14.1, 14.2 #226

Job	Run time
build (ubuntu-latest, clean, i386-pc-msdosdjgpp, binutils gcc djgpp-2.05 watt32)	13m 40s
build (ubuntu-latest, clean, i386-pc-msdosdjgpp, binutils gcc djgpp-cvs watt32)	13m 27s
build (ubuntu-latest, clean, i386-pc-msdosdjgpp, gdb)	4m 38s
build (ubuntu-latest, clean, arm-eabi, binutils gcc newlib)	25m 53s
build (ubuntu-latest, clean, arm-eabi, gdb)	31s
build (ubuntu-latest, clean, avr, binutils gcc avr-libc)	44m 25s
build (ubuntu-latest, clean, avr, gdb avarice simulavr avrdude)	54s
build (ubuntu-latest, clean, ia16-elf, binutils gcc newlib)	5m 56s
build (macos-latest, clean, i386-pc-msdosdjgpp, binutils gcc djgpp-2.05 watt32)	32m 56s
build (macos-latest, clean, i386-pc-msdosdjgpp, binutils gcc djgpp-cvs watt32)	16m 37s
build (macos-latest, clean, i386-pc-msdosdjgpp, gdb)	2m 2s
build (macos-latest, clean, arm-eabi, binutils gcc newlib)	30m 2s
build (macos-latest, clean, arm-eabi, gdb)	1m 39s
build (macos-latest, clean, avr, binutils gcc avr-libc)	9m 44s
build (macos-latest, clean, avr, gdb avarice simulavr avrdude)	2m 24s
build (macos-latest, clean, ia16-elf, binutils gcc newlib)	5m 45s
	3h 30m 33s

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