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/
subdir('libpurple')
subdir('protocols')
if ENABLE_GTK
subdir('pidgin')
else
pidgin_doc = []
endif
if enable_consoleui
subdir('finch')
else
finch_doc = []
endif
alias_target('doc', libpurple_doc, protocols_doc, pidgin_doc, finch_doc)