Force LANG=C to ensure sort(1) behaves as expected

usr.bin/make/unit-tests/Makefile

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.27 2010/04/22 19:15:24 sjg Exp $
+# $NetBSD: Makefile,v 1.28 2010/04/22 21:41:11 sjg Exp $
 #
 # Unit tests for make(1)
 # The main targets are:
@@ -58,6 +58,10 @@ clean:
 TEST_MAKE?= ${.MAKE}
 TOOL_SED?= sed
 
+# ensure consistent results from sort(1)
+LANG= C
+.export LANG
+
 # The driver.
 # We always pretend .MAKE was called 'make' 
 # and strip ${.CURDIR}/ from the output