libbtrfs: bump to version 0.1.4

There are no functional changes, only cleanup of header files. This
could lead to build failures in case the headers were used as a
convenience outside of scope of libbtrfs just because of the kernel
compatibility.

- removed various definitions of variables, types, helpers and macros
  from kerncompat.h that are neither used nor needed for libbtrfs code

- file list.h no longer shipped

- file rbtree.h no longer shipped

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

configure.ac

@@ -17,7 +17,7 @@ BTRFS_VERSION_PATCHLEVEL=`echo "${BTRFS_VERSION_PLAIN#v*}" | awk -F. '{print $3}
 dnl libbtrfs .so version
 LIBBTRFS_MAJOR=0
 LIBBTRFS_MINOR=1
-LIBBTRFS_PATCHLEVEL=3
+LIBBTRFS_PATCHLEVEL=4
 
 dnl libbtrfsutil .so version
 BTRFS_UTIL_VERSION_MAJOR=`sed -rn 's/^\#define BTRFS_UTIL_VERSION_MAJOR ([0-9])+$/\1/p' libbtrfsutil/btrfsutil.h`