fix minor Makefile bug
fix minor Makefile bug

tezenast/upfirdn,alddiaz/upfirdn,telegraphic/upfirdn,ozydingo/upfirdn,dan-zilla/upfirdn,telegraphic/upfirdn,salentoq/upfirdn,khouloud2015/upfirdn,totohaha/upfirdn,staticfloat/upfirdn,telegraphic/upfirdn,staticfloat/upfirdn,staticfloat/upfirdn,totohaha/upfirdn,husseinfadlallah/upfirdn,salentoq/upfirdn,salentoq/upfirdn,tectronics/upfirdn,totohaha/upfirdn,dan-zilla/upfirdn,tectronics/upfirdn,husseinfadlallah/upfirdn,dan-zilla/upfirdn,husseinfadlallah/upfirdn,khouloud2015/upfirdn,tectronics/upfirdn,khouloud2015/upfirdn,tezenast/upfirdn,alddiaz/upfirdn,ozydingo/upfirdn,tezenast/upfirdn,ozydingo/upfirdn