Add another build option to skip source scanning

It can be very slow on large source code dirs, and if one is trying to get an
application building and the scan already succeeded once, running it again and
again is a waste of time.

completion/bash-completion

@@ -94,7 +94,7 @@ __complete_options() {
 __complete_build() {
 	opts="-h -v -c -l -s -t -f"
 	lopts="--help --verbose --latest --server --resetserver --on-server
- --force --all"
+ --skip-scan --no-tarball --force --all"
 	case "${cur}" in
 		-*)
 			__complete_options