[polari] meson: Use meson.project_name() instead of app_id for pots

[Florian Müllner <fmuellner src gnome org>]

commit 475d9a1b0fbac27eafe75c988e41b180ff968b30
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Mon Oct 8 16:54:32 2018 -0400

    meson: Use meson.project_name() instead of app_id for pots
    
    Ubuntu's dh_translations tool for its language packs
    assumes that the translation templates match the project id.
    Let's follow that pattern.
    
    Before, the translation templates were named polari.pot and
    help-org.gnome.Polari.pot
    
    Now they are named polari.pot and help-polari.pot
    
    See comment 21 on https://launchpad.net/bugs/1762889

 help/meson.build | 2 +-
 po/meson.build   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/help/meson.build b/help/meson.build
index 83e16ef..d317298 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -1,4 +1,4 @@
-gnome.yelp(app_id,
+gnome.yelp(meson.project_name(),
   sources: [
     'index.page',
     'introduction.page',
diff --git a/po/meson.build b/po/meson.build
index 029e4e9..e9b77d7 100644
--- a/po/meson.build
+++ b/po/meson.build
@@ -1 +1 @@
-i18n.gettext('polari', preset: 'glib')
+i18n.gettext(meson.project_name(), preset: 'glib')