Add return statement to tests which should be skipped if dependencies are missing

Author: Tyil

t/command-bootstrap-man.t

@@ -12,11 +12,13 @@ use Test;
 if (!which("a2x")) {
 	note "'a2x' is not available";
 	done-testing;
+	return;
 }
 
 if (!which("gzip")) {
 	note "'gzip' is not available";
 	done-testing;
+	return;
 }
 
 multi sub MAIN { 0 }

t/command-dist.t

@@ -13,6 +13,7 @@ multi sub MAIN { 0 }
 if (!which("tar")) {
 	note "'tar' is not available";
 	done-testing;
+	return;
 }
 
 my $root = tempdir;