Fix build with experimental Serf features turned on.

* subversion/libsvn_ra_serf/util.c
  [SVN__SERF_EXPERIMENTAL]: With Serf trunk/2.0/1.5+, include the header
   serf_bucket_util.h for serf_default_readline().


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1935113 13f79535-47bb-0310-9956-ffa450edef68
1 file changed