Add IronPython 2.7.5

plugins/python-build/share/python-build/ironpython-2.7.5

@@ -0,0 +1,2 @@
+install_zip "IronPython-2.7.5" "https://github.com/IronLanguages/main/releases/download/ipy-2.7.5/IronPython-2.7.5.zip#d2651084a61a43379ce6c031f4f29c5e01ba96d1ff89a5282376dd4b84439b5b" ironpython
+# FIXME: have not confirmed to install setuptools into IronPython yet