gdbm: Update to version 1.25

gdbm: Update to version 1.25

- Update from version 1.24 to 1.25
- Update of rootfile not required
- Changelog
    1.25
	New function: gdbm_open_ext
		This function provides a general-purpose interface for opening and
		 creating GDBM files.  It combines the possibilities of gdbm_open
		 and gdbm_fd_open and provides detailed control over database file
		 locking.
	New gdbmtool command: collisions
		The command prints the collision chains for the current bucket, or
		 for the buckets identified by its arguments:
		  collisions
		     Display collisions for the current bucket.
		  collisions N
		     Display collisions for bucket N.
		  collisions N0 N1
		     Display collisions for the range of buckets [N0, N1].
	Pipelines in gdbmtool
		The output of a gdbmtool command can be connected to the input of a
		 shell command using the traditional pipeline syntax.
	Fix a bug in block coalescing code
	Other bugfixes

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>