Disable new tests for configurations with no libstdc++fs.a

	* testsuite/27_io/filesystem/path/construct/80762.cc: Skip test if
	the Filesystem TS support is not configured.
	* testsuite/experimental/filesystem/path/construct/80762.cc: Likewise.

From-SVN: r267082

libstdc++-v3/ChangeLog

+2018-12-13  Jonathan Wakely  <jwakely@redhat.com>
+
+	* testsuite/27_io/filesystem/path/construct/80762.cc: Skip test if
+	the Filesystem TS support is not configured.
+	* testsuite/experimental/filesystem/path/construct/80762.cc: Likewise.
+
 2018-12-12  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/71044 (partial)

libstdc++-v3/testsuite/27_io/filesystem/path/construct/80762.cc

@@ -17,6 +17,7 @@
 
 // { dg-options "-std=gnu++17" }
 // { dg-do compile { target c++17 } }
+// { dg-require-filesystem-ts "" }
 
 #include <filesystem>
 

libstdc++-v3/testsuite/experimental/filesystem/path/construct/80762.cc

@@ -16,6 +16,7 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do compile { target c++11 } }
+// { dg-require-filesystem-ts "" }
 
 #include <experimental/filesystem>