Add a small test to see if the tested compilers support out of line template methods.

[SVN r55992]

libs/unordered

@@ -1 +1 @@
-Subproject commit 6a8506d9591824bffce1b8ab9d9d240ed895a8be
+Subproject commit 7598d0d49bb5ba6d9c598af295df781303f25902