patch adds DECODER_FILES for libintel_common, this is so that platforms
such as Android not currently using this functionality can opt out.
Fixes: 7d84bb3 ("intel: Move tools/decoder.[ch] to common/gen_decoder.[ch].")
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>