Add static analysis and compilation test

.gitignore

.gitlab-ci.yml

Makefile

gitlab-ci/functional-api-test.sh

gitlab-ci/install-dependencies.sh

gitlab-ci/iopsys-supervisord.conf

gitlab-ci/setup.sh

gitlab-ci/shared.sh

src/Makefile

src/swmod.c

src/swmod.h

src/swmod_host.c

src/swmod_host.h

src/swmod_lxc.c

src/swmod_lxc.h

src/swmod_opkg.c

src/swmod_opkg.h

src/swmod_uci.c

src/swmod_uci.h

src/tools.c