[epiphany] Enable -Wdiscarded-qualifiers

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 9e7feb065d6e243b506e73289f23702087ad481f
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Sat Dec 26 21:04:55 2015 -0600

    Enable -Wdiscarded-qualifiers
    
    Seems Ting-Wei has fixed these when quashing -Wwrite-strings.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 001fb7f..f20bb9c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -37,7 +37,7 @@ AX_COMPILER_FLAGS([WARN_CFLAGS], [WARN_LDFLAGS], [$ax_is_release], [-Wdeclaratio
        dnl TODO: Remove all of these! These warnings should be fixed, not
        dnl silenced. At least, for the most part. -Wswitch-enum really does
        dnl seem pretty dumb.
-       [-Wno-deprecated-declarations -Wno-switch-enum -Wno-switch-default -Wno-discarded-qualifiers 
-Wno-sign-compare])
+       [-Wno-deprecated-declarations -Wno-switch-enum -Wno-switch-default -Wno-sign-compare])
 
 AC_PROG_CC