Fixed lots of issues with mm0 initialization, final one was an oversized do_munmap.

test0 now successfully runs its beginning.
test0 SConscript has a dependency problem.

Issues to be investigated:
- vm_file and vnodes need to be merged fully in all functions.
- libposix shared page references need to be removed.
- Any references to VFS_TID, PAGER_TID need to be removed.

conts/posix/mm0/mm/memory.c

@@ -157,6 +157,7 @@ void *pager_map_file_range(struct vm_file *f, unsigned long byte_offset,
 	return (void *)((unsigned long)page | (PAGE_MASK & byte_offset));
 }
 
+/* FIXME: PAGE_COLOR!!! */
 void *pager_validate_map_user_range2(struct tcb *user, void *userptr,
 				    unsigned long size, unsigned int vm_flags)
 {