Revert the integration of menhir for the time being.

Revert "Cherry pick use of menhir features from branch feature/menhir."
Revert "Further simplify Remakefile. Remove some inefficiency in module dependency checking script."
Revert "Remove passing $NATIVE on the remake command line of every target, since variable contents are propagated."
Revert "Modify configure.in and Remakefile.in to use menhir instead of ocamlyacc."