add bindep (#115)

add bindep

To fix: ! Package babel Error: Unknown option `english'. Either you misspelled it (babel) or the language definition file english.ldf was not found.

Reviewed-by: Artem Goncharov <Artem.goncharov@gmail.com>

bindep.txt

@@ -0,0 +1,4 @@
+# This is a cross-platform list tracking distribution packages needed by tests;
+# see https://docs.openstack.org/infra/bindep/ for additional information.
+
+texlive-babel-english [doc platform:rpm]