Copy libxsmm_generator.h in (which is missed in case of an out-of-tree build).
Copy libxsmm_generator.h in (which is missed in case of an out-of-tree build).

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