configure: support c++0x standard for directfd

While directfd upgrade to 1.7.6, it always includes directfb++ utils
when C++ is used and set c++0x as c++ standard.
(In git://git.directfb.org/git/directfb/core/DirectFB.git
commit b444bcae3197be9faf883460dcc239ef757d5922, and commit
522beeb76f2a8d2dee30d928d2a5955bd06cf25c)

The directfd in qt4 is c++, and there was a build failure:
...
| qdirectfbwindowsurface.cpp:336:69: error: in C++98 'rect' must be
initialized by constructor, not by '{...}'
|      const DFBRectangle rect = { r.x(), r.y(), r.width(), r.height() };
...

The g++ used c++98 as default c++ standard, we should
explicitly set c++0x for directfd in qt4.

Upstream-Status: Pending

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
---
 configure | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure b/configure
index 5724bd6..ecc2f8b 100755
--- a/configure
+++ b/configure
@@ -6656,6 +6656,7 @@ if [ "$PLATFORM_QWS" = "yes" ]; then
        if [ "${screen}" = "directfb" ] && [ "${CFG_CONFIGURE_EXIT_ON_ERROR}" = "yes" ]; then
            if test -n "$PKG_CONFIG" && "$PKG_CONFIG" --exists directfb 2>/dev/null; then
                QT_CFLAGS_DIRECTFB=`$PKG_CONFIG --cflags directfb 2>/dev/null`
+               QT_CFLAGS_DIRECTFB="$QT_CFLAGS_DIRECTFB -std=c++0x"
                QT_LIBS_DIRECTFB=`$PKG_CONFIG --libs directfb 2>/dev/null`
            elif directfb-config --version >/dev/null 2>&1; then
                QT_CFLAGS_DIRECTFB=`directfb-config --cflags 2>/dev/null`
-- 
1.9.1