[Bug 47877] New: Allow enabling Gallium Nine in official wine-staging builds

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=47877

Bug ID: 47877
           Summary: Allow enabling Gallium Nine in official wine-staging
                    builds
           Product: Wine-staging
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail]
      Distribution: ---

Wine should detect if Gallium Nine is present, and if it is, a checkbox
activating its usage in winecfg should be enabled. If I guess right (I have not
checked the source, but the fact that unofficial builds have this checkbox but
the official ones don't suggests that it is a compile-time option) currently
official wine-staging builds don't use nine.