asterisk-16.x: bump to version 16.25.2

asterisk-16.x: bump to version 16.25.2

This bumps asterisk to version 16.25.2 to address the following security
concerns:

https://downloads.asterisk.org/pub/security/AST-2022-001.html
https://downloads.asterisk.org/pub/security/AST-2022-002.html
https://downloads.asterisk.org/pub/security/AST-2022-003.html

Other changes:

- add two new modules (app_sf and func_json)
- update 100-build-reproducibly.patch as upstream refactored some of the
  code
- refresh patches
- "--disable-xmldoc" does no longer prevent the linking to libxslt, if
  available. If that's the case one is greeted with the following error:

    Package asterisk is missing dependencies for the following libraries:
    libxslt.so.1

  This commit explicitly disables the use of libxslt, to avoid the
  dependency.
- backport 160-AST_EXT_TOOL_CHECK.patch from master for issue #672
- backport 180_build-fix-bininstall-launchd-issue-on-cross-platfrom.patch
  from master to fix a build issue on MacOS (patch from Sergey V.
  Lobanov <sergey@lobanov.in>)

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>