define memdrawallocinit in header

Reference: /n/atom/patch/applied/mdallocinit
Date: Tue Apr 15 20:50:48 CES 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/include/memdraw.h	Tue Apr 15 20:50:48 2014
+++ /sys/include/memdraw.h	Tue Apr 15 20:50:48 2014
@@ -173,6 +173,7 @@
  * Kernel interface
  */
 void		memimagemove(void*, void*);
+void		memdrawallocinit(void);
 
 /*
  * Kernel cruft