Fix issue with older versions of "make".
Fix issue with older versions of "make".

egeor/libxsmm,maxhutch/libxsmm,hfp/libxsmm,hfp/libxsmm,hfp/libxsmm,egeor/libxsmm,hfp/libxsmm,egeor/libxsmm,maxhutch/libxsmm,hfp/libxsmm,maxhutch/libxsmm,maxhutch/libxsmm,egeor/libxsmm,hfp/libxsmm,egeor/libxsmm,egeor/libxsmm