Fix rtl-check build

2014-05-29  Tom de Vries  <tom@codesourcery.com>

	* rtl.h (BLOCK_SYMBOL_CHECK): Use SYMBOL_REF_FLAGS.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@211057 138bc75d-0d04-0410-961f-82ee72b054a4