Do the right thing with gendered namespaces

Two components to this bug:

- We need to store the gender-variant namespace_text for interwiki
  search results
- We need to tweak the namespace text formatting for local results
  to also vary on gender as need be

Bug: 32634
Change-Id: Ibdd4a564232c43b2c0afa86814523d7ec6daa66a
Merge "Do the right thing with gendered namespaces"