qsfdeps.pl: ignore Signaltap files

fpga/scripts/qsfdeps.pl

@@ -32,6 +32,8 @@ while (defined(my $l = <$in>)) {
 
     if ($name =~ /\.cof$/i) {
 	$cof_list{$name}++;
+    } elsif ($type =~ /^(signaltap_file|use_signaltap_file|sld_file)$/i) {
+	# Skip
     } elsif ($type =~ /^(mif|hex)_file$/i) {
 	$asm_deps{$name}++;
     } else {