Update to ocaml-images 4.0.1
Update to ocaml-gsl 1.13.0
Support native code compilation on armv6 (raspberry pi)

- asmrun/arm.S - select appropriate asm configuration for armv6 softfp
  under freebsd

- asmcomp/arch.ml - map freebsd to use EABI

- configure - detect arm*-*-freebsd* as an appropriate platform for
  native code compilation and set arch/machine/system appropriately

- Makefile - set correct options for assembly.  map armv6 to back to arm
  so the correct back end is compiled by ocaml

Closes #8
Remove OPT_DEF option

The choice of using the optimised compiler should be left to the
build system used by each individual OCaml project and not be enforced
by the package installation.

Closes #9
Bundle changes fir ocaml-4.01.0,3

- Remove OPT_DEF option
- Support native code compilation on armv6 (raspberry pi)
Vendor drop 357397

- ocaml
- ocaml-calendar
- ocaml-camomile
- ocaml-cppo
- ocaml-event
- ocaml-expat
Vendor drop 361056 ocaml
Vendor drop 363117
Vendor drop 369745
Merge branch 'vendor'
Merge branch 'ocaml-4.01.0,3'
Merge branch 'ocaml-gsl-1.15.1'
Merge branch 'ocaml-images-4.0.1'