graphics/blender: fix build on non-x86
Don't use SSE on non-x86.
/wrkdirs/usr/ports/graphics/blender/work/blender-2.91.0/intern/cycles/util/../util/util_simd.h:60:14: error: unknown type name 'm128'
extern const m128 _mm_lookupmask_ps[16];
Additionally, libunwind works on more architectures.