pidgin/pidgin

Ignore pidginprivate.h from the docs

2021-05-13, Gary Kramlich
1b5b70f24f62
Ignore pidginprivate.h from the docs

Testing Done:
Ran docs locally, had to remove the html and xml directories to have a clean build.

Reviewed at https://reviews.imfreedom.org/r/653/
protocols_doc = []
if DYNAMIC_FACEBOOK
subdir('facebook')
protocols_doc += facebook_doc
endif