ebc: implement --version option for pvics

For consistency reasons implement the --version option handling for the new
pvics tool.

Closes: https://github.com/ibm-s390-linux/s390-tools/pull/203
[seiden@linux.ibm.com: Add link to GH PR]
Signed-off-by: Dan Horák <dan@danny.cz>
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

scripts/pvics

@@ -710,7 +710,8 @@ Actions:
 
 	echo "
 Options:
-	-h, --help		Show this help text"
+	-h, --help		Show this help text
+	    --version		Show version information"
 	if [[ "${action}" == "[ACTION]" ]]; then
 		echo -e "\t-c, --config\t\tConfiguration yaml file"
 	fi
@@ -720,6 +721,13 @@ Options:
 	return 0
 }
 
+print_version() {
+	cat <<-EOD
+	$0: version %S390_TOOLS_VERSION%
+	Copyright IBM Corp.
+	EOD
+}
+
 
 #
 # CLI FUNCTIONS
@@ -747,7 +755,7 @@ cli() {
 		shift
 	fi
 
-	temp=$(getopt -o 'hc:i:' --long 'help,config:,image:' -- "$@")
+	temp=$(getopt -o 'hc:i:' --long 'help,version,config:,image:' -- "$@")
 	if ! eval set -- "$temp"; then
 		usage
 		return 1
@@ -762,6 +770,10 @@ cli() {
 				usage
 				exit 0
 			;;
+			'--version')
+				print_version
+				exit 0
+			;;
 			'-c'|'--config')
 				case "$2" in
 				'')