7072523: java.math should be built with javac -Xlint:all -Werror

Reviewed-by: darcy
Contributed-by: alexandre.boulgakov@oracle.com

make/java/math/Makefile

 #
-# Copyright (c) 1996, 2003, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 1996, 2011, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -27,6 +27,8 @@ BUILDDIR = ../..
 
 PACKAGE = java.math
 PRODUCT = sun
+JAVAC_MAX_WARNINGS = true
+JAVAC_WARNINGS_FATAL = true
 include $(BUILDDIR)/common/Defs.gmk
 
 #