Add visibility.m4 from upstream which is missing in the

Forwarded: https://github.com/strukturag/libde265/pull/355

release tarball.
===================================================================

Gbp-Pq: Name m4-visibility.patch

Disable building of some internal tools that no longer link

because internal symbols are no longer exported.

Gbp-Pq: Name disable_tools.patch

Only export symbols defined in the decoder API.

The encoder API is not final yet, so upstream exports all symbols to make
development easier. For packaging we only want to expose the public API.

Gbp-Pq: Name only_export_decoder_api.patch

libde265 (1.0.9-1.1) unstable; urgency=medium

  * Non-maintainer upload.
  * Apply patches to mitigate asan failures:
    reject_reference_pics_from_different_sps.patch and
    use_sps_from_the_image.patch.
  * Combined, this two patches fixes:
    - CVE-2022-43243, CVE-2022-43248, CVE-2022-43253 (Closes: #1025816)
    - CVE-2022-43235, CVE-2022-43236, CVE-2022-43237, CVE-2022-43238,
      CVE-2022-43239, CVE-2022-43240, CVE-2022-43241, CVE-2022-43242,
      CVE-2022-43244, CVE-2022-43250, CVE-2022-43252 (Closes: #1027179)
    - CVE-2022-47655
  * Additional patch recycle_sps_if_possible.patch to avoid over-rejecting
    valid video streams due to reject_reference_pics_from_different_sps.patch.
  * Modifying past changelog entries to indicate when vulnerabilities were
    fixed:
    - In 1.0.9-1, in total 11 CVE's. see #1004963 and #1014999
    - In 1.0.3-1, 1 CVE, see #1029396
  * drop unused Build-Depends: libjpeg-dev, libpng-dev and libxv-dev
    (Closes: #981260)

[dgit import unpatched libde265 1.0.9-1.1]

Import libde265_1.0.9-1.1.debian.tar.xz

[dgit import tarball libde265 1.0.9-1.1 libde265_1.0.9-1.1.debian.tar.xz]

Import libde265_1.0.9.orig.tar.gz

[dgit import orig libde265_1.0.9.orig.tar.gz]