parser.c (set_and_check_decl_spec_loc): Use rich_location::add_range in error message about __thread and thread_local...

/cp
2018-07-02  Paolo Carlini  <paolo.carlini@oracle.com>

	* parser.c (set_and_check_decl_spec_loc): Use rich_location::add_range
	in error message about __thread and thread_local at the same time.

/testsuite
2018-07-02  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/diagnostic/thread-thread_local.C: New.

From-SVN: r262321