doc updates: coding style and build-deps
Supplements https://source.puri.sm/Librem5/libhandy/merge_requests/250
Signed-off-by: Guido Günther guido.gunther@puri.sm
Edited by Guido Günther
Supplements https://source.puri.sm/Librem5/libhandy/merge_requests/250
Signed-off-by: Guido Günther guido.gunther@puri.sm