Changes in merged posix pager mm0 initialization.

- Moved rootfs from being embedded to mm0 image to being an independent image.
- MM0 boots up to start_init_process with updated boot convention.

conts/posix/mm0/include/init.h

@@ -29,7 +29,7 @@ struct initdata {
 
 extern struct initdata initdata;
 
-void init_pager(void);
+void init(void);
 
 /* TODO: Remove this stuff from here. */
 int init_devzero(void);