Use the meson macros in talkatu.spec.in rather than running it manually.
Testing Done:
Successfully ran the build for `fedora-31-amd64` and `fedora-32-amd64` but `fedora-33-amd64` and `fedora-rawhide-amd64` are failing with the `c compiler can't build executables` error I'm still working on figuring out.
Reviewed at https://reviews.imfreedom.org/r/123/
# SOME DESCRIPTIVE TITLE.
# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
# This file is distributed under the same license as the talkatu package.