Revert 4a7560 (camlp4 updated to track 4.06)
Revert 4a7560 (camlp4 updated to track 4.06)

This reverts commit 4a7560eb5558fc2648d95d5318841e88a6f97fb2.

gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml