added BETA=0 support to C/C++ frontend and IMM and BLAS fallback
added BETA=0 support to C/C++ frontend and IMM and BLAS fallback

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