Implement the creation of "special" files in the file-install work item.
Implement the creation of "special" files in the file-install work item.

* subversion/libsvn_wc/workqueue.c:
  (run_file_install): move the source stream fetching earlier, as we'll
    need it for all types of installation. implement the special file
    handling, as a simple call to svn_subst_create_specialfile().

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion