Similar to #821, this PR merges ahc-pkg/ghc-pkg-asterius, and patches the global libdir finding logic in ahc-pkg. All other places which calculate the global libdir location now all uses ahcLibDir, and this makes thing easier when we implement multiple libdir logic later.
Similar to #821, this PR merges
ahc-pkg/ghc-pkg-asterius, and patches the global libdir finding logic inahc-pkg. All other places which calculate the global libdir location now all usesahcLibDir, and this makes thing easier when we implement multiple libdir logic later.