[evince/wip/gpoo/always-enable-pdf] build: Always enable the pdf backend

[Germán Poo-Caamaño <gpoo src gnome org>]

commit 3b3a7849fa6372d31991fe4ff65b36491903e73c
Author: Germán Poo-Caamaño <gpoo gnome org>
Date:   Fri Jul 15 15:54:28 2022 -0400

    build: Always enable the pdf backend
    
    Since Evince 42.0 we became more aggressive to bump poppler's version,
    and let users use the improvements in PDF rendering.
    
    Additionally, pdf is likely the most used file format. It makes sense
    to attempt to enable it by default, and let the user force to disable
    it if they please.

 meson_options.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson_options.txt b/meson_options.txt
index c7b0d6ebb..5629da153 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -9,7 +9,7 @@ option('nautilus', type: 'boolean', value: true, description: 'whether Nautilus
 option('comics', type: 'feature', value: 'auto', description: 'whether Comics support is requested')
 option('djvu', type: 'feature', value: 'auto', description: 'whether DJVU support is requested')
 option('dvi', type: 'feature', value: 'auto', description: 'whether DVI support is requested')
-option('pdf', type: 'feature', value: 'auto', description: 'whether PDF support is requested')
+option('pdf', type: 'feature', value: 'enabled', description: 'whether PDF support is requested')
 option('ps', type: 'feature', value: 'disabled', description: 'whether PS support is requested')
 option('tiff', type: 'feature', value: 'auto', description: 'whether TIFF support is requested')
 option('xps', type: 'feature', value: 'auto', description: 'whether XPS support is requested')