Two strings added to Orca

[Joanmarie Diggs <jdiggs igalia com>]

Hey all.

I just added two strings to Orca's gnome-3-12 branch:

~~~~~~~~~~~~
 # Translators: this is for navigating among links in a document.
+LINK_PREV = _("Goes to previous link.")
+
+# Translators: this is for navigating among links in a document.
+LINK_NEXT = _("Goes to next link.")
+
+# Translators: this is for navigating among links in a document.
 LINK_LIST = _("Displays a list of links.")
~~~~~~~~~~~~

Sorry for not getting it in before the announcement period began and, as
always, thank you for all your work!!

--joanie