add more test cases
add more test cases

bragadeesh/rocFFT,ROCmSoftwarePlatform/rocFFT,ROCmSoftwarePlatform/rocFFT,tingxingdong/rocFFT-1,ROCmSoftwarePlatform/rocFFT,ROCmSoftwarePlatform/rocFFT,bragadeesh/rocFFT,tingxingdong/rocFFT-1,bragadeesh/rocFFT,tingxingdong/rocFFT-1