grim/gplugin

Use meson.project_build_root instead of meson.build_root

2021-10-07, Elliott Sales de Andrade
ad3ceac87107
Use meson.project_build_root instead of meson.build_root

The former is new in 0.56, but we require 0.58 and so the latter causes a
deprecation warning.
gplugin-gtk3-viewer/data/window.ui
gplugin-gtk3-viewer/gplugin-gtk-viewer-window.c
gplugin-gtk3-viewer/gplugin-gtk-viewer.c
gplugin-gtk3/data/plugin-info.ui
gplugin-gtk3/gplugin-gtk-plugin-info.c
gplugin-gtk3/gplugin-gtk-store.c
gplugin-gtk3/gplugin-gtk-view.c
gplugin-query/gplugin-query.c
gplugin/gplugin-core.c
gplugin/gplugin-file-tree.c
gplugin/gplugin-loader.c
gplugin/gplugin-manager.c
gplugin/gplugin-native-loader.c
gplugin/gplugin-native-plugin.c
gplugin/gplugin-options.c
gplugin/gplugin-plugin-info.c
gplugin/gplugin-plugin.c
gplugin/gplugin-private.c
gplugin/gplugin-version.c
lua/gplugin-lua-core.c
lua/gplugin-lua-loader.c
lua/gplugin-lua-plugin.c
lua/gplugin-lua-test-lgi.c
perl5/gplugin-perl5-core.c
perl5/gplugin-perl5-loader.c
perl5/gplugin-perl5-plugin.c
python3/gplugin-python3-core.c
python3/gplugin-python3-loader.c
python3/gplugin-python3-plugin.c
python3/gplugin-python3-test-pygobject.c
python3/gplugin-python3-utils.c
tcc/gplugin-tcc-core.c
tcc/gplugin-tcc-loader.c
tcc/gplugin-tcc-plugin.c