impove memory accounting

. the total amount of memory in the system didn't include the memory
	  used by the boot-time modules and some dynamic allocation by the
	  kernel at boot time (to map in VM). especially apparent on our
	  ARM board with 'only' 512MB of memory and a huge ramdisk.
	. also: *add* the VM loaded module to the freelist after it has
	  been allocated for & mapped in instead of cutting it *out* of the
	  freelist! so we get a few more MB free..

Change-Id: If37ac32b21c9d38610830e21421264da4f20bc4f

include/minix/param.h

@@ -41,7 +41,8 @@ typedef struct kinfo {
         char release[6];        /* kernel release number */
         char version[6];        /* kernel version number */
 	int vm_allocated_bytes; /* allocated by kernel to load vm */
-	int kernel_allocated_bytes;	/* used by kernel */
+	int kernel_allocated_bytes;		/* used by kernel */
+	int kernel_allocated_bytes_dynamic;	/* used by kernel (runtime) */
 } kinfo_t;
 
 #endif