Rename some variables for clarity.
Rename some variables for clarity.

* subversion/libsvn_wc/update_editor.c
  (merge_file): Rename 'actual_checksum'      -> 'new_text_base_md5_checksum'.
  (close_file): Rename 'expected_hex_digest'  -> 'expected_md5_digest',
                       'expected_checksum'    -> 'expected_md5_checksum',
                       'md5_actual_checksum'  -> 'new_text_base_md5_checksum',
                       'sha1_actual_checksum' -> 'new_text_base_sha1_checksum',
                       'new_base_abspath'     -> 'new_text_base_abspath'.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@931976 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion