[oe] Avoid version going backwards for beta versions

[Burton, Ross]

On 31 May 2018 at 11:28, André Draszik <git at andred.net> wrote:
> In debian based distros, the tilde will always cause sorting to be lower
> than the version specified before the tilde, so e.g.
>
> fluidsynth-2.0.0~beta.1
>
> works as expected, and I *think* this latter approach works in OE, too.

Yes, RPM4/dpkg/opkg all support this syntax, so this does work in OE.

Ross