Added ternary operator

examples/proofs/tests/generated_code.v

examples/proofs/tests/generated_proof_test_ternary.v

examples/proofs/tests/generated_spec.v

examples/proofs/tests/proof_files

examples/tests.c

frontend/ail_to_coq.ml

frontend/coq_ast.ml

frontend/coq_pp.ml

theories/lang/lang.v

theories/lang/lifting.v

theories/lang/tactics.v

theories/typing/automation.v

theories/typing/int.v

theories/typing/programs.v