Adjust the naming of svn_version.h.dist to allow multiple releases at the same
time.

* tools/dist/release.py
  (roll_tarballs,move_to_dist): Include the version number in the
    svn_version.h.dist file, e.g. svn_version.h.dist-1.6.21
 
Patch by: danielsh
 


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1464654 13f79535-47bb-0310-9956-ffa450edef68
* subversion/tests/libsvn_subr/error-code-test.c
  (err_defn): Following up on r1464570, follow struct layout change in error.c


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1464667 13f79535-47bb-0310-9956-ffa450edef68