Coded volk_gnsssdr_32fc_x7_cw_vepl_corr_32fc_x5

Coded volk_gnsssdr_32fc_x7_cw_vepl_corr_32fc_x5 protokernel, that
performs the carrier wipe-off mixing and the VE, Early, Prompt, Late
and VL correlation with 64 bits vectors.
Modified the code of the module to allow volk protokernels with 12
input+outputs.