ghcjs: build with GHC 7.10.3

pkgs/development/haskell-modules/configuration-ghcjs.nix

···
   # LLVM is not supported on this GHC; use the latest one.
   inherit (pkgs) llvmPackages;
 
-  inherit (pkgs.haskell.packages.ghc7102) jailbreak-cabal alex happy gtk2hs-buildtools;
+  inherit (pkgs.haskell.packages.ghc7103) jailbreak-cabal alex happy gtk2hs-buildtools rehoo hoogle;
 
   # This is the list of packages that are built into a booted ghcjs installation
   # It can be generated with the command:

pkgs/top-level/haskell-packages.nix

···
       inherit (packages.ghc784) ghc alex happy;
     };
 
-    ghcjs = packages.ghc7102.callPackage ../development/compilers/ghcjs {
-      ghc = compiler.ghc7102;
+    ghcjs = packages.ghc7103.callPackage ../development/compilers/ghcjs {
+      ghc = compiler.ghc7103;
     };
 
     jhc = callPackage ../development/compilers/jhc {