mate-settings-daemon: Fix PLIST when nss option is disabled

Index: PLIST
===================================================================
RCS file: /cvsroot/pkgsrc/x11/mate-settings-daemon/PLIST,v
retrieving revision 1.5
diff -u -p -r1.5 PLIST
--- PLIST	20 May 2018 19:17:30 -0000	1.5
+++ PLIST	25 Oct 2018 08:41:24 -0000
@@ -18,7 +18,7 @@ lib/mate-settings-daemon/libkeyboard.la
 lib/mate-settings-daemon/libmedia-keys.la
 lib/mate-settings-daemon/libmouse.la
 lib/mate-settings-daemon/libmpris.la
-lib/mate-settings-daemon/libsmartcard.la
+${PLIST.nss}lib/mate-settings-daemon/libsmartcard.la
 lib/mate-settings-daemon/libsound.la
 lib/mate-settings-daemon/libtyping-break.la
 lib/mate-settings-daemon/libxrandr.la
@@ -27,7 +27,7 @@ lib/mate-settings-daemon/libxsettings.la
 lib/mate-settings-daemon/media-keys.mate-settings-plugin
 lib/mate-settings-daemon/mouse.mate-settings-plugin
 lib/mate-settings-daemon/mpris.mate-settings-plugin
-lib/mate-settings-daemon/smartcard.mate-settings-plugin
+${PLIST.nss}lib/mate-settings-daemon/smartcard.mate-settings-plugin
 lib/mate-settings-daemon/sound.mate-settings-plugin
 lib/mate-settings-daemon/typing-break.mate-settings-plugin
 lib/mate-settings-daemon/xrandr.mate-settings-plugin