NTT: run NTT(2^18) on 2 KB blocks to closer match the final performance; bugfix in TransposeMatrix()
NTT: run NTT(2^18) on 2 KB blocks to closer match the final performance; bugfix in TransposeMatrix()

Bulat-Ziganshin/FastECC,Bulat-Ziganshin/FastECC,Bulat-Ziganshin/FastECC