Added warning for "desirable" results that don't come true.

Cleaned up test types: they should be either "all-trivial" or "all-non-trivial".
Added new test cases for has_nothrow* traits.
Fixed test cases for has_virtual_destructor.


[SVN r28662]

libs/type_traits

@@ -1 +1 @@
-Subproject commit c0c0da2eb61d4bef089e5ca0860555632cf4e9bf
+Subproject commit 30571abccc8465fc275958539b3435dda14ef007