This patch update the telecomm-FFT benchmark to use saved sin/cos values for some inputs, to account

for the differences of the AIX libm math library. When compared to Linux libm, with the AIX version of the

sin and cos functions producing slightly less accurate results (with 1 ulp).

The AIX sin function produces different results when the input is (pi/4) or (pi/16), whereas the cos function

produces different results for the input (pi/4). The Linux libm sin/cos results based off these inputs are saved

as three const-declared variables and substituted in when appropriate to ensure the benchmark on AIX

produces the same results.