[nautilus] Include pkg-config package name in introspection file.

[Carlos Soriano <csoriano src gnome org>]

commit 4d0330a72161cffca5e71aaa2bdfc3513ebace64
Author: Tomasz Miąsko <tomasz miasko gmail com>
Date:   Sat Jan 5 00:00:00 2019 +0000

    Include pkg-config package name in introspection file.
    
    This effectively adds `<package name="libnautilus-extension"/>` to gir
    xml file, which makes it easy to obtain necessary compiler and linker
    flags for use in compile time bindings.

 libnautilus-extension/meson.build | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/libnautilus-extension/meson.build b/libnautilus-extension/meson.build
index c01899498..ad791f60e 100644
--- a/libnautilus-extension/meson.build
+++ b/libnautilus-extension/meson.build
@@ -76,6 +76,9 @@ libnautilus_extension = shared_library(
 if get_option('introspection')
   gnome.generate_gir(
     libnautilus_extension,
+    export_packages: [
+      'libnautilus-extension'
+    ],
     extra_args: [
       '-DNAUTILUS_COMPILATION'
     ],