Kanye West took to Twitter tonight to announce the signing of 2 Chainz to G.O.O.D. Music. First, 2 Chainz hopped on "Mercy," and then 'Ye held him down on a recent trip to 106 & Park (see picture above). And now, it looks like he's officially G.O.O.D. See tweet below. 2 Chainz is charging 100k for a verse now cause he's G.O.O.D!!!!!! — Kanye West (@kanyewest) May 11, 2012 Follow @C…