[Audacity-translation] Updated original translation to Basque

[Osoitz E <oe...@gm...>]

Hello James,

Find enclosed the collaborative translation to Basque by Librezale.

This work is a continuation of the original translation made under the
supervision of the Basque Government's Language Department [1], and has
been recovered from Audacity's GitHub repository [2]. For lexical decisions
not covered in the original translation we attempted to always follow
established conventions in the fields of professional sound, physics and
music.

Aligning with the rest of the software ecosystem, we believe it would be
preferable to give this work the 'eu' locale code. We understand 'eu_ES'
might be okay, albeit not ideal.

Greetings,

Osoitz on behalf of Librezale

[1] http://www.euskadi.eus/eusko-jaurlaritza/hizkuntza-politika/
[2] https://github.com/audacity/audacity/blob/40ff3fd0b85e39b6af0f02b5e46873
696b58b38d/locale/eu.po