kodev: two small fixes (#3575)
kodev: two small fixes (#3575)

- kodev-run: fix use of $args
- kodev-build: build the emulator in debug mode, for consistency
with kodev-run
- kodev build: add --debug / --no-debug options
mwoz123/koreader,poire-z/koreader,NiLuJe/koreader,lgeek/koreader,Frenzie/koreader,poire-z/koreader,Markismus/koreader,koreader/koreader,houqp/koreader,Hzj-jie/koreader,koreader/koreader,mihailim/koreader,pazos/koreader,Frenzie/koreader,apletnev/koreader,NiLuJe/koreader