[vte] build: Remove -Wpacked warning

[Christian Persch <chpe src gnome org>]

commit 4f95d4ed9df726d8d4404d3601639844278780c2
Author: Christian Persch <chpe gnome org>
Date:   Wed Sep 30 20:26:35 2015 +0200

    build: Remove -Wpacked warning
    
    It shows warnings in vte on i386, but not on anything else afaics.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 41e1438..0b342d1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -122,7 +122,7 @@ m4_define([compiler_flags_common],[ dnl
   -Wno-missing-field-initializers dnl
   -Wno-switch-enum dnl
   -Wno-unused-parameter dnl
-  -Wpacked dnl
+  -Wno-packed dnl
   -Wshadow dnl
   -Wsign-compare dnl
   -Wstrict-aliasing=2 dnl