Add ifdef in SSE2/AVX2 fft tests
Add ifdef in SSE2/AVX2 fft tests

Fixes X86 configurations where ENABLE_{SSE2,AVX2} is false.

BUG=b/111259291

Change-Id: I3f18fa0438506e4406a38499036cf66cb7c4a082

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom