[MacPorts] #64946: Allow +universal for libde265: add muniversal PortGroup

[MacPorts]

#64946: Allow +universal for libde265: add muniversal PortGroup
-------------------------------------+----------------------
 Reporter:  barracuda156             |      Owner:  mcalhoun
     Type:  defect                   |     Status:  assigned
 Priority:  Normal                   |  Milestone:
Component:  ports                    |    Version:  2.7.2
 Keywords:  powerpc, leopard, ppc64  |       Port:  libde265
-------------------------------------+----------------------
 Lack of universal variant creates problems down the road. I tried to build
 `imlib2` as `+universal`, it complained about `libheif`:

 {{{
 --->  Computing dependencies for imlib2.
 Error: Cannot install imlib2 for the archs 'ppc ppc64' because
 Error: its dependency libheif does not build for the required archs by
 default
 Error: and does not have a universal variant.
 Error: Follow https://guide.macports.org/#project.tickets if you believe
 there
 is a bug.
 }}}

 In turn, `libheif` likewise claimed that its dependency `libde265` can
 only build for ppc but not for ppc+ppc64.
 However it is unjustified: I added `muniversal 1.0` to its Portfile, and
 with no patches it has built:

 {{{
 36-109:~ svacchanda$ port -v installed libde265
 The following ports are currently installed:
   libde265 @1.0.8_0 requested_variants='' platform='darwin 9' archs='ppc'
 date='2022-03-08T04:21:56+0800'
   libde265 @1.0.8_0+universal (active) requested_variants='+universal'
 platform='darwin 9' archs='ppc ppc64' date='2022-04-06T03:29:23+0800'
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/64946>
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