build: Add iso-image command

Signed-off-by: Pawel Dziepak <pdziepak@quarnos.org>
build: Remove unnecessary flags from x86[_64] builds

Signed-off-by: Pawel Dziepak <pdziepak@quarnos.org>
kernel: Add stack protection

Signed-off-by: Pawel Dziepak <pdziepak@quarnos.org>
Add *.iso files to .gitignore

Signed-off-by: Pawel Dziepak <pdziepak@quarnos.org>