libimg needs NET_EscapeDoubleQuote, which is in libnetwork.

cmd/xfe/icons/Makefile

@@ -160,6 +160,7 @@ MKICONS_LIB	=  \
 		  $(DIST)/lib/libutil.a \
 		  $(DIST)/lib/libxp.a \
 		  $(DIST)/lib/libplc21.a \
+		  $(DIST)/lib/libnetwork.a \
 		  $(DIST)/lib/libxpcom.a
 endif