pidgin/pidgin

Update Meson to newer standards

2021-10-18, Elliott Sales de Andrade
1653402dd94e
Update Meson to newer standards

* Remove checks for old Meson
We require 0.56.0 now.
* Remove deprecated Meson call
* Update calls to `pkgconfig.generate`
The library to wrap should be passed as first positional argument, and we can
pass actual dependencies as the runtime requirements. We can't pass things that
might be subprojects as dependencies, which may be a Meson bug, so pass those
ones as strings.

Testing Done:
Re-configured and looked at the pkgconfig files.

Reviewed at https://reviews.imfreedom.org/r/1064/
#define REVISION "@VCS_TAG@"