o Fix invalid synaptics issue with x11-drivers/xf86-input-void

driver by displaing NOTICE on pkg-message.
o Fix invalid compiling on amd64.

PR:		ports/120783
Submitted and
Summraized by:	Eygene Ryabinkin  rea-fbsd a codelabs.ru

x11-drivers/synaptics/files/patch-Makefile

@@ -8,7 +8,8 @@
 +  ARCH = $(shell uname -m)
  endif
  ifeq ($(ARCH),amd64)
-   ARCH = x86_64
+-  ARCH = x86_64
++  override ARCH = x86_64
  endif
  ifeq ($(ARCH),x86_64)
    ARCH_DEFINES = -D__x86_64__ -D_XSERVER64

x11-drivers/synaptics/pkg-message

@@ -2,10 +2,6 @@
 
 			* SETUP NOTE * SETUP NOTE *
 
-o Please remove ${X11BASE}/lib/modules/input/synaptics_drv.so
-  manually, If you have installed synaptics-0.14.4_1.  I forgot
-  to chase pkg-plist on 0.14.4_1.
-
 o Add boot time tunable to /boot/loader.conf.
   Set hw.psm.synaptics_support=1 and shutdown -r now!
 
@@ -29,6 +25,9 @@ o Set your /etc/xorg.conf (or /etc/XF86Config)
   Please disable your existing "CorePointer" in "ServerLayout"
   section, only use "Synaptics_Touchpad" CorePointer.
 
+  * IMPORTANT NOTICE *
+  Please set *AllowEmptyInput* option at ServerFlags section.
+
 /etc/xorg.conf (or /etc/XF86Config) ---------------
 	:
 Section "Module"
@@ -36,6 +35,11 @@ Section "Module"
 	Load		"synaptics"
 EndSection
 
+Section "ServerFlags"
+		:
+	Option		"AllowEmptyInput"
+EndSection
+
 Section "ServerLayout"
 		:
 #	InputDevice	"Standard_PS/2_Mouse"	"CorePointer"