Remove Requires: lines which will be inferred

Signed-off-by: David Scott <dave.scott@citrix.com>
Add %{?_isa} to the end of Requires:

I excluded the %{name} = %{version}-%{release} line since no other package
had it.

Signed-off-by: David Scott <dave.scott@citrix.com>
Remove unnecessary rm -rf %{buildroot}

Signed-off-by: David Scott <dave.scott@citrix.com>
Add mkdir -p %{OCAMLFIND_DESTDIR}

Signed-off-by: David Scott <dave.scott@citrix.com>
Replace ocaml setup.ml -install with 'make install'

Signed-off-by: David Scott <dave.scott@citrix.com>