gn2bp: Allow pclmul and ssse3 cflag

Test: ./gen_android_bp --desc desc.json "//net:net_nqe_proto"
Test:  m cronet_aml_net_net_nqe_proto_gen cronet_aml_net_net_nqe_proto_gen_headers
Change-Id: I377f34092d4a994c92d5ca592cb1b1a91b227127
2 files changed