Fix program name in version strings

When running swaymsg -v, the version returned is actually the version of
swaymsg itself, yet the message displayed was "sway version <version>".
This can create confusion if users update sway and swaymsg but don't
restart sway, then use swaymsg to check the version.

This patch changes the wording to be "swaymsg version <version>"
instead, and likewise for swaybar.

To get the version of a running sway instance, users should run swaymsg
-t get_version.

swaybar/main.c

@@ -62,7 +62,7 @@ int main(int argc, char **argv) {
 			bar_id = strdup(optarg);
 			break;
 		case 'v':
-			fprintf(stdout, "sway version " SWAY_VERSION "\n");
+			fprintf(stdout, "swaybar version " SWAY_VERSION "\n");
 			exit(EXIT_SUCCESS);
 			break;
 		case 'd': // Debug

swaymsg/main.c

@@ -345,7 +345,7 @@ int main(int argc, char **argv) {
 			cmdtype = strdup(optarg);
 			break;
 		case 'v':
-			fprintf(stdout, "sway version " SWAY_VERSION "\n");
+			fprintf(stdout, "swaymsg version " SWAY_VERSION "\n");
 			exit(EXIT_SUCCESS);
 			break;
 		default: