Cabal revisions of plugins-1.5.1.2

Hackage metadata revisions edit the .cabal file after upload; each diff below is one revision.

 name:               plugins version:            1.5.1.2+x-revision: 1 homepage:           http://code.haskell.org/~dons/code/hs-plugins synopsis:           Dynamic linking for Haskell and C objects description:        Dynamic linking and runtime evaluation of Haskell,                           filepath,                           random,                           process,-                          ghc >= 6.10,+                          ghc >= 6.10 && < 7.2,                           ghc-prim-