attic: update source hash

I don't know what changed, but apparently something did. We're using
fetchzip and the 0.14 tag doesn't seem to have moved (AFAICS).

Build and run-tested.

For reference, the (current) annotated tag '0.14' is dated
"Wed Dec 17 23:32:11 2014 +0100" and points to commit
f342621dff8065b29aeda238ccce5ac92d04f5b6 ("Preparing release").