pypy: correctly bump the version

pkgs/development/interpreters/pypy/2.3/setup-hook.sh

@@ -1,12 +1,12 @@
 addPythonPath() {
-    addToSearchPathWithCustomDelimiter : PYTHONPATH $1/lib/pypy2.2/site-packages
+    addToSearchPathWithCustomDelimiter : PYTHONPATH $1/lib/pypy2.3/site-packages
 }
 
 toPythonPath() {
     local paths="$1"
     local result=
     for i in $paths; do
-        p="$i/lib/pypy2.2/site-packages"
+        p="$i/lib/pypy2.3/site-packages"
         result="${result}${result:+:}$p"
     done
     echo $result

pkgs/top-level/all-packages.nix

@@ -3531,7 +3531,7 @@ let
   python = python27;
   python3 = python3Packages.python;
 
-  pypy = callPackage ../development/interpreters/pypy/2.2 { };
+  pypy = callPackage ../development/interpreters/pypy/2.3 { };
 
   pythonFull = python27Full;
   python26Full = callPackage ../development/interpreters/python/wrapper.nix {