* New upstream release from the beta channel (FIREFOX_87_0b4_BUILD1)
* Add Silesian language pack
  - update debian/config/locales.all
  - update debian/config/locales.shipped
  - update debian/control
* Drop upstreamed patches
  - debian/patches/s390x-fix-hidden-symbol.patch
* Update patches
  - debian/patches/armhf-reduce-linker-memory-use.patch