audio/faust-lv2: fix build on powerpc64*
ld: error: relocation R_PPC64_TOC16_LO cannot be used against symbol LV2Plugin::n_tunings; recompile with -fPIC
defined in /tmp/NLFeks-70c8a9.o
referenced by NLFeks.cpp/tmp/NLFeks-70c8a9.o:(lv2_dyn_manifest_get_data)