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.