fix for testing - avoid mktemp.

Note, Now depends on boost file system and boost system !!!

[SVN r67306]

libs/serialization

@@ -1 +1 @@
-Subproject commit 8ac1c19a7f455ada8ba714537eec0d11174efcfb
+Subproject commit f568824c94f86c2fbe2361f5808d16d473ed1e5e