[libsoup] meson.build: set c_std to gnu99

[Patrick Griffis <pgriffis src gnome org>]

commit 5c3d431bdb094c59997f2a23e31e83f815ab667c
Author: Fabrice Fontaine <fontaine fabrice gmail com>
Date:   Thu Jul 1 22:09:23 2021 +0200

    meson.build: set c_std to gnu99
    
    Set c_std to gnu99 to avoid the following build failure with gcc 4.8:
    
    In file included from 
/tmp/instance-0/output-1/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/resolv.h:65:0,
                     from 
/tmp/instance-0/output-1/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/glib-2.0/gio/gnetworking.h:40,
                     from ../libsoup/soup-address.c:14:
    /tmp/instance-0/output-1/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/arpa/nameser.h:115:2: 
error: unknown type name 'u_char'
      const u_char *_msg, *_eom;
      ^
    
    Fixes:
     - http://autobuild.buildroot.org/results/56b9cb987e25b99d6fed16c537552f47c3376f21
    
    Signed-off-by: Fabrice Fontaine <fontaine fabrice gmail com>

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 4dfd8c15..a5ebc63a 100644
--- a/meson.build
+++ b/meson.build
@@ -3,7 +3,7 @@ project('libsoup', 'c',
         meson_version : '>= 0.53',
         license : 'LGPL2',
         default_options : [
-          'c_std=c99',
+          'c_std=gnu99',
           'warning_level=2',
         ])