Convert some uses of loggy_copy over to OP_FILE_INSTALL.
Convert some uses of loggy_copy over to OP_FILE_INSTALL.

* subversion/libsvn_wc/merge.c:
  (eval_conflict_func_result): rather than calling loggy_copy(), set a
    source path, and break out of the switch. in one case, we generate a
    temp file which needs to be removed after the installation. add logic,
    based on REMOVE_SOURCE, to manage this. and lastly, outside the
    switch, make use of the INSTALL_FROM to do the working file install.

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