adding CUDA in LDPC test

cmake_targets/CMakeLists.txt

cmake_targets/build_oai

openair1/PHY/CODING/TESTBENCH/ldpctest.c

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG1_I0

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG1_I1

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG1_I2

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG1_I3

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG1_I4

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG1_I5

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG1_I6

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG1_I7

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG2_I0

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG2_I1

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG2_I2

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG2_I3

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG2_I4

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG2_I5

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG2_I6

openair1/PHY/CODING/nrLDPC_decoder_LYC/bgs/BG2_I7

openair1/PHY/CODING/nrLDPC_decoder_LYC/nrLDPC_decoder_LYC.cu