pidgin/pidgin

Add missing i18n headers.

2020-11-16, Elliott Sales de Andrade
defc6aec1761
Add missing i18n headers.

These are needed via `PIDGIN_ALERT_TITLE` -> `PIDGIN_NAME` -> `_("Pidgin")`

Testing Done:
Compile only.

Reviewed at https://reviews.imfreedom.org/r/223/
---
name: libpurple-common
buildsystem: simple
build-commands:
- true
modules:
- external/avahi.yml
- external/cyrus-sasl2.yml
- external/farstream.yml
- external/libgadu.yml
- external/libidn.yml
- external/mercurial.yml
- gplugin.yml