Teach examples/ostc-fwupdate about OSTC3
Teach examples/ostc-fwupdate about OSTC3

This teaches the example firmware upgrader about how to upgrade the
OSTC3's.

Signed-off-by: Anton Lundin <0a6ca81d300dbabb82140c80e76039139ef86644@acc.umu.se>

henrik242/libdivecomputer,henrik242/libdivecomputer,Poltsi/libdivecomputer-vms,glance-/libdivecomputer,glance-/libdivecomputer