libsrtp2-linphone-2.2.0~git.20210916-bp156.3.5

- Update to latest available snapshot, no changelog available

- Create libsrtp2-linphone1-32bit needed by mediastreamer2

- Use pkgconfig(openssl); package builds with libressl too.

- First release in OBS
- Add change-name.patch to change the name from libsrtp2 to libsrtp2-linphone,
  as this would otherwise conflict with libsrtp2 from Cisco.