overlays/xinit: fix startx patch

overlays/patches/startx.patch

@@ -2,25 +2,12 @@ diff --git a/startx.cpp b/startx.cpp
 index 125c398..296b29f 100644
 --- a/startx.cpp
 +++ b/startx.cpp
-@@ -47,10 +47,10 @@ XCOMM so export the new PATH just in case the user changes the shell
- export PATH
- #endif
- 
--userclientrc=$HOME/.xinitrc
-+userclientrc="${XINITRC:-$HOME/.xinitrc}"
- sysclientrc=XINITDIR/xinitrc
- 
--userserverrc=$HOME/.xserverrc
-+userserverrc="${XSERVERRC:-$HOME/.xserverrc}"
- sysserverrc=XINITDIR/xserverrc
- defaultclient=XTERM
- defaultserver=XSERVER
 @@ -270,7 +270,7 @@ if [ x"$enable_xauth" = x1 ] ; then
      dummy=0
  
      XCOMM create a file with auth information for the server. ':0' is a dummy.
 -    xserverauthfile=$HOME/.serverauth.$$
 +    xserverauthfile=$XAUTHORITY
-     trap "rm -f '$xserverauthfile'" HUP INT QUIT ILL TRAP KILL BUS TERM
+     trap "rm -f '$xserverauthfile'" HUP INT QUIT ILL TRAP BUS TERM
      xauth -q -f "$xserverauthfile" << EOF
  add :$dummy . $mcookie