Fix typo in C++ standard version.

	* lto-wrapper.c: Fix typo in comment about
	C++ standard version.

gcc/ChangeLog

+2020-03-02  Martin Liska  <mliska@suse.cz>
+
+	* lto-wrapper.c: Fix typo in comment about
+	C++ standard version.
+
 2020-03-01  Martin Sebor  <msebor@redhat.com>
 
 	PR c++/92721

gcc/lto-wrapper.c

@@ -1234,7 +1234,7 @@ init_num_threads (void)
 #endif
 }
 
-/* FIXME: once using -std=c11, we can use std::thread::hardware_concurrency.  */
+/* FIXME: once using -std=c++11, we can use std::thread::hardware_concurrency.  */
 
 /* Return true when a jobserver is running and can accept a job.  */