[gimp] libgimp: (meson) build GIR file silently.

[Jehan <jehanp src gnome org>]

commit 4a4359d3da4994f2de694f016afc9a5b6c5cf51b
Author: Jehan <jehan girinstud io>
Date:   Wed Jan 15 22:19:44 2020 +0100

    libgimp: (meson) build GIR file silently.
    
    In case of errors or warnings, they will still be displayed, but it is
    better to not show outputs when everything is building fine.

 libgimp/meson.build | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/libgimp/meson.build b/libgimp/meson.build
index 7797b09771..c616ac69d6 100644
--- a/libgimp/meson.build
+++ b/libgimp/meson.build
@@ -386,6 +386,7 @@ else
       '-DGIMP_THUMB_COMPILATION',
       '-DGIMP_WIDGETS_COMPILATION',
       '-DGIMP_DISABLE_DEPRECATED',
+      '--quiet',
     ],
 
     includes: [