audio/twolame: update to 0.4.0

Changes in this release are [1]:

• Added free format encoding (now up to 450 kbps)
• Added DAB utility methods for ScF-CRC handling
• Added twolame_get_original() and twolame_set_original()
• Added twolame_get_extension() and twolame_set_extension()
• Bundled .spec file in tarball for building RPM for twolame
• Make libsndfile dependency (and therefore the frontend) optional
• Fixed VBR encoding
• Fixed setting for error protection flag
• Fixed padding bugs
• Fixed scaling of floating point input source through libsndfile
• Removed slotinfo global variables to fix a thread safety bug
• Switched to handling reading from STDIN using libsndfile
• Improvements to the Windows build process
• Compiler and Valgrind warning fixes
• Various other fixes and enhancements

[1] https://sourceforge.net/p/twolame/mailman/message/36783308/