Log Message:
tex-oberdiek{,-doc}: update to 2018

 Update to two packages in the collection:

  pdftexcmds :  add support for MD5 sum commands in XeTeX
                (using new primitives added to XeTeX last year)

  accsupp    :  support for Luatex added (separate from pdftex option,
                so the luatex85 compatibility package no longer required)

Updated Oberdiek bundle
use rb (binary) file reading for md5 checksum for issue #34 (pdftexcmds)

fix test for etec.src for issue #33  (iflang)

Skip patching with newer graphics (fixes #29) (grffile)

Merge pull request #25 from yudai-nkt/comment-with-doublecaretnotation
(hologo)

Comment out the BibTeX-like entry with ^^A (hologo)