libstdc++.exp (libstdc++_init): Unset LANGUAGE environment variable.

	* testsuite/lib/libstdc++.exp (libstdc++_init): Unset LANGUAGE
	environment variable.

From-SVN: r223937

libstdc++-v3/ChangeLog

+2015-06-01  Jonathan Wakely  <jwakely@redhat.com>
+
+	* testsuite/lib/libstdc++.exp (libstdc++_init): Unset LANGUAGE
+	environment variable.
+
 2015-05-31  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/66354

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

@@ -107,6 +107,10 @@ proc libstdc++_init { testfile } {
     setenv LC_ALL C
     setenv LANG C
 
+    # LANGUAGE changes the behavior of GNU gettext(3) and causes
+    # std::messages tests to fail.
+    array unset env LANGUAGE
+
     # Many hosts now default to a non-ASCII C locale, however, so
     # they can set a charset encoding here if they need.
     if { [ishost "*-*-cygwin*"] } {