libowfat: update to version 0.33

libowfat: update to version 0.33

Remove no longer needed downstream patches.

Changes since 0.32:

  add byte_start, byte_starts

  add a man page for byte_equal_notimingattack

  buffer_seek is no longer limited to the current buffer contents

  add automated way to run unit test: make check

  add parse.h

  add bytestream abstraction for parsing data from a buffer or a file

  add compiler.h to abstract gcc attributes

  add fmt_strm_malloc

  add cross references to open_* and mmap_* man pages

  add fmt_strm_alloca and fmt_strm_malloc man pages

  add buffer_init_allocbuf, buffer_init_read, buffer_init_write,
  buffer_init_read_allocbuf, buffer_init_write_allocbuf

  fix buffer overread for len=0 in scan_longn (Martin Castillo)

  add iob_write2 with sendfile callback so caller can use OpenSSL's
  SSL_sendfile

Signed-off-by: Daniel Golle <daniel@makrotopia.org>