Added 2 new kernels + modified kernels

Included d_correlator.Carrier_wipeoff_and_EPL_volk_custom as a new
protokernel called “volk_gnsssdr_32fc_x5_cw_epl_corr_32fc_x3” with
support for SSE3 and GENERIC.

Added new protokernel volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3 with
support for SSE2, SSE4.1, GENERIC and ORC.

Added support for SSE4.1 and SSE2 in volk_gnsssdr_8ic_x2_multiply_8ic
and volk_gnsssdr_8ic_x2_dot_prod_8ic.

Added support for AVX in volk_gnsssdr_8ic_conjugate_8ic.

Modified qa_utils.cc and qa_utils.h to be able to test protokernels
with 8 inputs and outputs.