[gnome-software] trivial: Silence invalid warnings from new GCC versions

[Richard Hughes <rhughes src gnome org>]

commit df31c677af93ab67f9f1398518a00950fca63692
Author: Richard Hughes <richard hughsie com>
Date:   Tue Feb 9 11:26:49 2016 +0000

    trivial: Silence invalid warnings from new GCC versions

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 02a6e1a..0b90b36 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,6 +43,7 @@ GNOME_COMPILE_WARNINGS([maximum],[
        -Winline
        -Wmissing-parameter-type
        -Woverride-init
+       -Wno-discarded-qualifiers
 ])
 
 dnl ---------------------------------------------------------------------------