[gnome-software/wip/mak/libas] Use C11 standard

[Matthias Klumpp <mak src gnome org>]

commit f86490c04eb46a2ffc8e7934d3415385a3ad1d2a
Author: Matthias Klumpp <matthias tenstral net>
Date:   Wed Feb 10 19:07:20 2021 +0100

    Use C11 standard
    
    This is currently only a workaround as the C standard applies globally
    to subprojects which may use C11 features (so setting C99 is too low).
    Currently, GNOME Software itself does not use any C11-isms.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 7de3149d6..612764070 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project('gnome-software', 'c',
   version : '40.beta',
   license : 'GPL-2.0+',
-  default_options : ['warning_level=1', 'c_std=c99'],
+  default_options : ['warning_level=1', 'c_std=c11'],
   meson_version : '>=0.47.0'
 )