svn merge ^/nixpkgs/trunk

Merge conflicts:
* unzip (almost trivial)
* dvswitch (trivial)
* gmp (copied result of `git merge`)

The last item introduced gmp-5.0.3, thus full rebuild.
+ensureDir->mkdir -p in TeX packages was catched by git but not svn.

svn path=/nixpkgs/branches/stdenv-updates/; revision=32091

pkgs/development/tools/parsing/happy/1.18.9.nix

@@ -0,0 +1,21 @@
+{ cabal, mtl, perl }:
+
+cabal.mkDerivation (self: {
+  pname = "happy";
+  version = "1.18.9";
+  sha256 = "12k1rg7dqa02az9d1zasdnp51zs4h30kpi5lyqsw3jxfp09cad3x";
+  isLibrary = false;
+  isExecutable = true;
+  buildDepends = [ mtl ];
+  buildTools = [ perl ];
+  meta = {
+    homepage = "http://www.haskell.org/happy/";
+    description = "Happy is a parser generator for Haskell";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+    maintainers = [
+      self.stdenv.lib.maintainers.andres
+      self.stdenv.lib.maintainers.simons
+    ];
+  };
+})