Remove the fsfs-reorg dev tool as it has been superseded by 
FSFS format 7.

* build.conf
  (fsfs-reorg): Drop target.
  (__MORE__): Remove deleted target from list.

* tools/dev
  (svn:ignore): Remove tool binary.

* tools/dev/fsfs-reorg.c
  (): Delete tool source code file.

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1553386 13f79535-47bb-0310-9956-ffa450edef68