mem: export should_dump_page() from mem.c

We'll use it to decide should we dump anon shmem page or not.
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/include/mem.h

@@ -2,6 +2,8 @@
 #define __CR_MEM_H__
 
 #include <stdbool.h>
+#include "asm/int.h"
+#include "vma.pb-c.h"
 
 struct parasite_ctl;
 struct vm_area_list;
@@ -32,4 +34,5 @@ int open_vmas(struct pstree_item *t);
 int prepare_vmas(struct pstree_item *t, struct task_restore_args *ta);
 int unmap_guard_pages(struct pstree_item *t);
 int prepare_mappings(struct pstree_item *t);
+bool should_dump_page(VmaEntry *vmae, u64 pme);
 #endif /* __CR_MEM_H__ */

criu/mem.c

@@ -78,7 +78,7 @@ unsigned int dump_pages_args_size(struct vm_area_list *vmas)
 		(vmas->priv_size + 1) * sizeof(struct iovec);
 }
 
-static inline bool should_dump_page(VmaEntry *vmae, u64 pme)
+bool should_dump_page(VmaEntry *vmae, u64 pme)
 {
 #ifdef CONFIG_VDSO
 	/*