Adjust preference_bundle templates to append preferenceloader dependency

ios/preference_bundle/NIC/control.pl

@@ -0,0 +1,26 @@
+my $parent = abs_path();
+my $control = -f "$parent/control" ? "$parent/control" : "$parent/layout/DEBIAN/control";
+
+die "Failed to find parent project control file!\n" unless -f $control;
+
+open my $fh, "<", $control or error "Failed to open $control (read)!\n";
+my @lines = <$fh>;
+close $fh;
+
+my $updated = 0;
+for my $line (@lines) {
+    next unless $line =~ /^Depends:/;
+    unless ($line =~ /preferenceloader/) {
+		$line =~ s/$/, preferenceloader/;
+        $updated = 1;
+    }
+}
+
+if ($updated) {
+    open my $out, ">", $control or error "Failed to open $control (write)!\n";
+    print $out @lines;
+    close $out;
+    print "Added 'preferenceloader' dependency to $control!\n";
+} else {
+    print "Note: 'preferenceloader' dependency already present or no 'Depends' line found!\n";
+}

ios/preference_bundle_swift/NIC/control.pl

@@ -0,0 +1,26 @@
+my $parent = abs_path();
+my $control = -f "$parent/control" ? "$parent/control" : "$parent/layout/DEBIAN/control";
+
+die "Failed to find parent project control file!\n" unless -f $control;
+
+open my $fh, "<", $control or error "Failed to open $control (read)!\n";
+my @lines = <$fh>;
+close $fh;
+
+my $updated = 0;
+for my $line (@lines) {
+    next unless $line =~ /^Depends:/;
+    unless ($line =~ /preferenceloader/) {
+		$line =~ s/$/, preferenceloader/;
+        $updated = 1;
+    }
+}
+
+if ($updated) {
+    open my $out, ">", $control or error "Failed to open $control (write)!\n";
+    print $out @lines;
+    close $out;
+    print "Added 'preferenceloader' dependency to $control!\n";
+} else {
+    print "Note: 'preferenceloader' dependency already present or no 'Depends' line found!\n";
+}