Add PyPy 5.7.1 portable

plugins/python-build/share/python-build/pypy2-5.7.1

@@ -20,13 +20,7 @@ case "$(pypy_architecture 2>/dev/null || true)" in
   if require_distro "Ubuntu 12.04" "Ubuntu 12.10" "Ubuntu 13.04" "Ubuntu 13.10" "Ubuntu 14.04" 1>/dev/null 2>&1; then
     install_package "pypy2-v5.7.1-linux64" "https://bitbucket.org/pypy/pypy/downloads/pypy2-v5.7.1-linux64.tar.bz2#c4fa3da42156bed4a9d912433b618a141e0c5161d7cc8c328786736ea5d1c2da" "pypy" verify_py27 ensurepip
   else
-    { echo
-      colorize 1 "ERROR"
-      echo ": The binary distribution of PyPy is not available for $(pypy_architecture 2>/dev/null || true)."
-      echo "try 'pypy2-5.7.0-src' to build from source."
-      echo
-    } >&2
-    exit 1
+    install_package "pypy-5.7.1-linux_x86_64-portable" "https://bitbucket.org/squeaky/portable-pypy/downloads/pypy-5.7.1-linux_x86_64-portable.tar.bz2#8a6a194963eb58d582413c4bcdef6119f9f9f117a05032d1fb13192d934510c6" "pypy" verify_py27 ensurepip
   fi
   ;;
 "osx64" )