On the fsfs-format7 branch:  Introduce a handful of SVN-private macros
that can help the compiler make better decisions about code layout.
The use of these macros is completely optional and will *never* change
the behavior of the code.

* configure.ac
  (AH_BOTTOM): expand to define SVN__PREDICT_FALSE, SVN__PREDICT_TRUE,
               SVN__FORCE_INLINE and SVN__PREVENT_INLINE

* subversion/svn_private_config.hw
  (SVN__PREDICT_FALSE,
   SVN__PREDICT_TRUE,
   SVN__FORCE_INLINE,
   SVN__PREVENT_INLINE): define them for Visual C 

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/fsfs-format7@1438982 13f79535-47bb-0310-9956-ffa450edef68