Add general Jamfile

Jamfile

@@ -0,0 +1,11 @@
+#  Boost.Intrusive Library Jamfile
+#
+#  Copyright (c) 2018 Ion Gaztanaga
+#
+#  Use, modification, and distribution are subject to the
+#  Boost Software License, Version 1.0. (See accompanying file
+#  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+# please order by name to ease maintenance
+build-project example ;
+build-project test ;