package/freerdp: fix a comment

Reported-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/freerdp/freerdp.mk

@@ -176,6 +176,6 @@ else # ! SERVER && ! CLIENT
 
 FREERDP_CONF_OPTS += -DWITH_X11=OFF
 
-endif # ! USES_XLIBS
+endif # ! SERVER && ! CLIENT
 
 $(eval $(cmake-package))