libtheora: upgrade 1.1.1 -> 1.2.0

libtheora: upgrade 1.1.1 -> 1.2.0

Drop no-docs.patch, and use "--disable-doc" configuration instead.
Drop autoreconf.patch, because it is included in the release.

Add 0001-add-missing-files.patch to mitigate a release issue, which
caused some files to be missing from the tarball.

Major changes:
  - New 'ptalarbvorm' encoder
  - New th_encode_ctl option for copying configuration from an existing
    setup header, useful for splicing streams.
  - Added support for RISC OS.
  - Improved ARM support.
  - Various speed, bug fixes and code quality improvements.

See CHANGES file for full changelog.

Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>