Revert back to pre-release of 0.8.6.
The 0.8.6 version throws a Not_found error which breaks ocaml-gettext.
Revert back to the previous working version.
Revert "Avoid a stack overflow in the OCaml 4.05 compiler on POWER only."
This reverts commit 9c0d3bbc749daf2dfc755055ac3d0f0c4f499fb0.
Revert "New upstream version 0.8.6."
This reverts commit 194663eaf7e813dbb407e4aaeac11401136b5598.