pidgin/pidgin

Switch join_paths and + to /.

2020-09-16, Elliott Sales de Andrade
c0ea70247280
Switch join_paths and + to /.

Testing Done:
Ran `ninja install`, though didn't actually check the results.

Reviewed at https://reviews.imfreedom.org/r/121/
---
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