use pic on amd64. should fix the amd64 moz plugin

configure.ac

@@ -5391,6 +5391,19 @@ AS_IF([test "${enable_shared_libvlc}" != "no" || test "${enable_libtool}" != "no
   AC_DEFINE(HAVE_SHARED_LIBVLC, 1, [Define to 1 if libvlc is built as a shared library.])
   FILE_LIBVLC_DLL="!define LIBVLC_DLL libvlc.dll"],
   FILE_LIBVLC_DLL="" )
+dnl
+dnl we need pic on amd64 fo the mozilla plugin
+
+case "${target_cpu}" in
+     x86_64)
+	pic=pic
+	;;
+     *)
+	pic=""
+	;;
+esac
+AC_SUBST(pic)
+
 
 dnl Import conditional variables generated by bootstrap
 VLC_CONDITIONALS