pc-bios: refresh edk2 build artifacts for edk2-stable201905

Rebuild the pc-bios/edk2-*.fd.bz2 binaries, and regenerate
pc-bios/edk2-licenses.txt, based on the edk2-stable201905 release.

Cc: Philippe Mathieu-Daudé <[email protected]>
Ref: https://bugs.launchpad.net/qemu/+bug/1831477
Signed-off-by: Laszlo Ersek <[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Tested-by: Philippe Mathieu-Daudé <[email protected]>

Author: Laszlo Ersek