Follow-up to r1461535:

* subversion/tests/libsvn_repos/repos-test.c
  (filename_trailing_newline): Tweak this test to verify behaviour of
   the repos layer, not the FS layer. Current consensus seems to be that
   the FS API should allow such names, and the repos layer should reject
   them. So expect a commit of the transaction via the repos API to fail,
   rather than expecting the FS layer to reject the creation of filenames
   with trailing newlines in transactions.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1461542 13f79535-47bb-0310-9956-ffa450edef68