libstdc++: Disable diagnostic URLs in testsuite

	* testsuite/lib/libstdc++.exp (v3_target_compile): Add
	-fdiagnostics-urls=never to options.

libstdc++-v3/ChangeLog

+2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
+
+	* testsuite/lib/libstdc++.exp (v3_target_compile): Add
+	-fdiagnostics-urls=never to options.
+
 2020-02-27  Patrick Palka  <ppalka@redhat.com>
 
 	* include/std/ranges (transform_view::_Iterator<_Const>): Befriend

libstdc++-v3/testsuite/lib/libstdc++.exp

@@ -482,7 +482,7 @@ proc v3_target_compile { source dest type options } {
     global STATIC_LIBCXXFLAGS
     global tool
 
-    lappend options "additional_flags=-fno-diagnostics-show-caret -fdiagnostics-color=never"
+    lappend options "additional_flags=-fno-diagnostics-show-caret -fdiagnostics-color=never -fdiagnostics-urls=never"
 
     if { [target_info needs_status_wrapper] != "" && [info exists gluefile] } {
 	lappend options "libs=${gluefile}"