rpm: move pod2man & rst2html deps outside the autotools conditional

The generated man pages were previously bundled in the dist, so pod2man
was inside the autotools conditional. We no longer bundle any generated
files in the dist though, so pod2man must always be present.

rst2html then mistakenly just followed what pod2man did.
Reviewed-by: NCole Robinson <crobinso@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

libvirt.spec.in

@@ -264,10 +264,10 @@ BuildRequires: autoconf
 BuildRequires: automake
 BuildRequires: gettext-devel
 BuildRequires: libtool
+%endif
 BuildRequires: /usr/bin/pod2man
 # Replace with python3-docutils when we drop py2 support
 BuildRequires: /usr/bin/rst2html
-%endif
 BuildRequires: gcc
 BuildRequires: git
 %if 0%{?fedora} || 0%{?rhel} > 7