Added ironpython-2.7.7

plugins/python-build/share/python-build/ironpython-2.7.7

@@ -0,0 +1,2 @@
+install_package "IronPython-2.7.7" "https://github.com/IronLanguages/main/releases/download/ipy-2.7.7/IronPython-2.7.7-win.zip#657c134ff6d6f0ed86557d9455dcdfeac11823944f7aa36d72a41cc5444c4a89" ironpython
+# FIXME: have not confirmed to install setuptools into IronPython yet