Remove static from prepare_task_entries function

For the upcoming userfaultfd integration the lazy-pages mode needs to
setup the criu infrastructure to read the pages files.
Signed-off-by: Adrian Reber <areber@redhat.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/cr-restore.c

@@ -2146,7 +2146,7 @@ out:
 	return -1;
 }
 
-static int prepare_task_entries(void)
+int prepare_task_entries(void)
 {
 	task_entries_pos = rst_mem_align_cpos(RM_SHREMAP);
 	task_entries = rst_mem_alloc(sizeof(*task_entries), RM_SHREMAP);

criu/include/pstree.h

@@ -110,6 +110,7 @@ extern int pid_to_virt(pid_t pid);
 
 struct task_entries;
 extern struct task_entries *task_entries;
+extern int prepare_task_entries(void);
 
 extern int get_task_ids(struct pstree_item *);
 extern struct _TaskKobjIdsEntry *root_ids;