Bump version to 0.4.2.1
Bump version to 0.4.2.1

Ignore-this: 7235d621604a091ff9753047a5f1126b

darcs-hash:20130319161054-c1f02-d21ffc5bf8ac3b580cee567065a07b199eb6b2e9

llelf/language-c,llelf/language-c,llelf/language-c