vnc: add missing target for vnc-encodings-*.o

vnc-encodings-*.c dependencies where missing.
Signed-off-by: NCorentin Chary <corentincj@iksaif.net>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Makefile

@@ -120,11 +120,11 @@ vnc-auth-vencrypt.o: vnc-auth-vencrypt.c vnc.h
 
 vnc-auth-sasl.o: vnc-auth-sasl.c vnc.h
 
-vnc-encoding-zlib.o: vnc.h
+vnc-encoding-zlib.o: vnc-encoding-zlib.c vnc.h
 
-vnc-encoding-hextile.o: vnc.h
+vnc-encoding-hextile.o: vnc-encoding-hextile.c vnc.h
 
-vnc-encoding-tight.o: vnc.h vnc-encoding-tight.h
+vnc-encoding-tight.o: vnc-encoding-tight.c vnc.h vnc-encoding-tight.h
 
 curses.o: curses.c keymaps.h curses_keys.h