[bug#30380] gnu: Add dolphin-emulator.

[Thompson, David]

Here a couple of patches that add the Dolphin emulator.  I used a Git
snapshot because the project goes *years* between releasing official
source tarballs while at the same time directing users to use binaries
built from the latest commit in their Git repo, so I think packaging
the Git source aligns best with what a Dolphin user would expect.

- Dave

0001-gnu-Add-wxwidgets-gtk2-3.1.patch
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0002-gnu-Add-dolphin-emulator.patch
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