added automatik checkout of seissol_kernels from github
added automatik checkout of seissol_kernels from github

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