multimedia/x265: force rebuild consumers after 645419c8e465

$ ffmpeg
ld-elf.so.1: Shared object "libx265.so.192" not found, required by "libavcodec.so.60"

PR: 274526
Reported by: vvd (on dev-commits-ports-main@ list)
Reported by: Kevin Oberman (on multimedia@ list)