lirc.org: fix Buildroot link
lirc.org: fix Buildroot link

Busybox is not a Linux distro. Commit bd6f04e0ddda most likely meant to
add a reference to Buildroot, a Linux system generator that shares some
of its history with Busybox. Fix this.

stb-tester/lirc,stb-tester/lirc,stb-tester/lirc,stb-tester/lirc,stb-tester/lirc,stb-tester/lirc