add defines for large file support to standard CFLAGS

- this fixes a compiler warning about the redefinition of
  SIZEOF_OFF_T in the python bindings, because python is
  compiled with large file support.

server/configure.ac

@@ -14,6 +14,8 @@ AC_DEFUN([SMB_ENABLE], [echo -n ""])
 AC_INIT([sss_daemon],
         m4_esyscmd([cat ../VERSION |head -n1 | tr -d '\n']),
         [[email protected]])
+CFLAGS="$CFLAGS -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
+
 AC_CONFIG_SRCDIR([conf_macros.m4])
 AC_CONFIG_AUX_DIR([build])