pidgin/pidgin

remove the glib version macros from internal.h to meson and make sure everything is consistent

2021-10-28, Gary Kramlich
b60171ce4589
remove the glib version macros from internal.h to meson and make sure everything is consistent

Testing Done:
Compiled and ran the unit tests.

Reviewed at https://reviews.imfreedom.org/r/1111/
syntax: glob
.*.swp
.DS_Store
.flatpak-builder
*.pyc
*~
\#*\#
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?
po\/pidgin\.pot$
^subprojects\/.+\/