btrfs-progs: move free-space-tree.[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

@@ -161,7 +161,7 @@ libbtrfs_objects = send-stream.o send-utils.o kernel-lib/rbtree.o btrfs-list.o \
 		   uuid-tree.o utils-lib.o common/rbtree-utils.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-shared/free-space-tree.o repair.o inode-item.o file-item.o \
 		   kernel-lib/raid56.o kernel-lib/tables.o \
 		   common/device-scan.o common/path-utils.o \
 		   common/utils.o libbtrfsutil/subvolume.o libbtrfsutil/stubs.o \

check/main.c

@@ -36,7 +36,7 @@
 #include "common/utils.h"
 #include "cmds/commands.h"
 #include "free-space-cache.h"
-#include "free-space-tree.h"
+#include "kernel-shared/free-space-tree.h"
 #include "common/rbtree-utils.h"
 #include "backref.h"
 #include "kernel-shared/ulist.h"

extent-tree.c

@@ -30,7 +30,7 @@
 #include "crypto/crc32c.h"
 #include "volumes.h"
 #include "free-space-cache.h"
-#include "free-space-tree.h"
+#include "kernel-shared/free-space-tree.h"
 #include "common/utils.h"
 
 #define PENDING_EXTENT_INSERT 0

kernel-shared/free-space-tree.c

@@ -19,7 +19,7 @@
 #include "ctree.h"
 #include "disk-io.h"
 #include "free-space-cache.h"
-#include "free-space-tree.h"
+#include "kernel-shared/free-space-tree.h"
 #include "volumes.h"
 #include "transaction.h"
 #include "kernel-lib/bitops.h"