Fix a couple of bugs

Use `.` instead of `source`. Fix populating the index file.
Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>

bin/ci.sh

@@ -52,7 +52,7 @@ main() {
 	while getopts 'c:' o; do
 		case "${o}" in
 			c)
-				source "${OPTARG}"
+				. ${OPTARG}
 				;;
 		esac
 	done

lib/util.sh

@@ -58,11 +58,11 @@ build_number() {
 	if [ -e ${HBSD_INDEX_FILE} ]; then
 		n=$(cat ${HBSD_INDEX_FILE})
 		n=$((${n} + 1))
-		echo ${n} | tee ${HBSD_INDEX_FILE}
-		return 0
+	else
+		n=1
 	fi
 
-	echo 1
+	echo ${n} | tee ${HBSD_INDEX_FILE}
 	return 0
 }