[gnome-builder] Fix minor typo

[Garrett Regier <gregier src gnome org>]

commit aec47a393bc028c621f3266bc62dbcbc3da00c19
Author: Garrett Regier <garrettregier gmail com>
Date:   Fri Mar 18 12:19:30 2016 -0700

    Fix minor typo

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 04f6bcb..9188bcd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -410,7 +410,7 @@ PLUGIN_CFLAGS="$PLUGIN_CFLAGS -I\$(top_srcdir)/libide/preferences"
 PLUGIN_CFLAGS="$PLUGIN_CFLAGS -I\$(top_srcdir)/libide/util"
 PLUGIN_CFLAGS="$PLUGIN_CFLAGS $LIBIDE_CFLAGS"
 PLUGIN_CFLAGS="$PLUGIN_CFLAGS $DEBUG_CFLAGS"
-PLUGIN_CFLAGS="$PLUGIN_CFLAGS $OPTIMIZE_LDFLAGS"
+PLUGIN_CFLAGS="$PLUGIN_CFLAGS $OPTIMIZE_CFLAGS"
 AC_SUBST(PLUGIN_CFLAGS)
 
 PLUGIN_LDFLAGS="$PLUGIN_LDFLAGS $OPTIMIZE_LDFLAGS"