[Rpm-maint] [rpm-software-management/rpm] Add support for new package declarations in Perl 5.12+ (#237)

[Sebastian Riedel]

This is a [patch](https://build.opensuse.org/package/view_file/Base:System/rpm/perlprov-package.diff) we apply to rpm in openSUSE. It allows the `perl.prov` script to detect new variants of Perl package declarations that have been added in recent years.

In [Perl 5.12](https://metacpan.org/pod/distribution/perl/pod/perl5120delta.pod#New-package-NAME-VERSION-syntax) we got version numbers as part of the package declaration.
```perl
package Foo 1.0;

package Bar v1.0.0;
```

And in [Perl 5.14](https://metacpan.org/pod/distribution/perl/pod/perl5140delta.pod#package-block-syntax) we got the package block syntax.
```perl
package Foo {...}

package Bar 1.0 {...}

package Baz v1.0.0 {...}
```

We noticed this problem recently because [Dist::Zilla](https://metacpan.org/source/RJBS/Dist-Zilla-6.009/lib/Dist/Zilla.pm#L1), a popular Perl module, started using a version number as part of the package declaration and `perl(Dist::Zilla)` could no longer be resolved.
You can view, comment on, or merge this pull request online at:

  https://github.com/rpm-software-management/rpm/pull/237

-- Commit Summary --

  * Add support for new package declarations in Perl 5.12+

-- File Changes --

    M scripts/perl.prov (6)

-- Patch Links --

https://github.com/rpm-software-management/rpm/pull/237.patch
https://github.com/rpm-software-management/rpm/pull/237.diff

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