multimedia/dirac: Added -std=c++11 to the CXXFLAGS.

This is mandatory if cppunit is installed but
should be safe in either case

Signed-off-by: Matteo Bernardini <ponce@slackbuilds.org>

multimedia/dirac/dirac.SlackBuild

@@ -78,7 +78,7 @@ patch -p1 < $CWD/gcc45.patch
 sed -i "s|\ -Werror\"|\"|" configure
 
 CFLAGS="$SLKCFLAGS" \
-CXXFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS -std=c++11" \
 ./configure \
   --prefix=/usr \
   --sysconfdir=/etc \