btrfs-progs: move delayed-ref.[ch] to kernel-shared/

The files are very close to kernel versions, for that keep them in the
shared directory.

Signed-off-by: David Sterba <dsterba@suse.com>

Makefile

@@ -159,7 +159,7 @@ libbtrfs_objects = send-stream.o send-utils.o kernel-lib/rbtree.o btrfs-list.o \
 		   kernel-lib/radix-tree.o extent-cache.o extent_io.o \
 		   crypto/crc32c.o common/messages.o \
 		   uuid-tree.o utils-lib.o common/rbtree-utils.o \
-		   ctree.o disk-io.o extent-tree.o delayed-ref.o print-tree.o \
+		   ctree.o disk-io.o extent-tree.o kernel-shared/delayed-ref.o print-tree.o \
 		   free-space-cache.o root-tree.o volumes.o transaction.o \
 		   free-space-tree.o repair.o inode-item.o file-item.o \
 		   kernel-lib/raid56.o kernel-lib/tables.o \

kernel-shared/delayed-ref.c

@@ -5,7 +5,7 @@
 
 #include "ctree.h"
 #include "btrfs-list.h"
-#include "delayed-ref.h"
+#include "kernel-shared/delayed-ref.h"
 #include "transaction.h"
 
 /*

transaction.c

@@ -17,8 +17,7 @@
 #include "kerncompat.h"
 #include "disk-io.h"
 #include "transaction.h"
-#include "delayed-ref.h"
-
+#include "kernel-shared/delayed-ref.h"
 #include "common/messages.h"
 
 struct btrfs_trans_handle* btrfs_start_transaction(struct btrfs_root *root,

transaction.h

@@ -21,8 +21,8 @@
 
 #include "kerncompat.h"
 #include "ctree.h"
-#include "delayed-ref.h"
 #include "kernel-lib/list.h"
+#include "kernel-shared/delayed-ref.h"
 
 struct btrfs_trans_handle {
 	struct btrfs_fs_info *fs_info;