i18n: Add pulseaudio.pot to version control

Since the .pot file can be automatically generated, it hasn't been
included in the git repository so far. However, we're planning[1] to
start using Fedora's Weblate translation service, and it requires the
.pot file to be in the repository.

[1] https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/785

po/.gitignore

@@ -6,7 +6,6 @@
 /en@boldquot.header
 /en@quot.header
 /insert-header.sin
-/pulseaudio.pot
 /quot.sed
 /remove-potcdate.*
 /*.mo

po/meson.build

@@ -1,4 +1,11 @@
 i18n = import('i18n')
-i18n.gettext(meson.project_name(), preset: 'glib')
+i18n.gettext(
+  meson.project_name(),
+  preset: 'glib',
+  # Page width is set to 90 characters in order to avoid bad wrapping of the
+  # bug reporting address.
+  args: ['--msgid-bugs-address=https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/new',
+         '--width=90'],
+)
 
 po_dir = meson.current_source_dir()