xorg-server: fix xorg.conf installation from project/device dir

find_file_path has to be put into an if, otherwise its return
code (which is usually 1) will leak into post_makeinstall_target

Signed-off-by: Matthias Reichl <hias@horus.com>

packages/x11/xserver/xorg-server/package.mk

@@ -156,8 +156,9 @@ post_makeinstall_target() {
   fi
 
   mkdir -p $INSTALL/etc/X11
-    find_file_path config/xorg.conf &&
+    if find_file_path config/xorg.conf ; then
       cp $FOUND_PATH $INSTALL/etc/X11
+    fi
 
   if [ ! "$DEVTOOLS" = yes ]; then
     rm -rf $INSTALL/usr/bin/cvt