Add missing include of attribs.h in lto.c

2017-08-08  Tom de Vries  <tom@codesourcery.com>

	* lto.c: Include attribs.h.

From-SVN: r250949

gcc/lto/ChangeLog

+2017-08-08  Tom de Vries  <tom@codesourcery.com>
+
+	* lto.c: Include attribs.h.
+
 2017-08-08  Martin Liska  <mliska@suse.cz>
 
 	* lto-lang.c: Include header files.

gcc/lto/lto.c

@@ -53,6 +53,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "lto-symtab.h"
 #include "stringpool.h"
 #include "fold-const.h"
+#include "attribs.h"
 
 
 /* Number of parallel tasks to run, -1 if we want to use GNU Make jobserver.  */