Added the Variant library test-suite.

[SVN r18580]

libs/variant

@@ -1 +1 @@
-Subproject commit 49a95fe3e85c361058c121af34084c94dc4faa21
+Subproject commit 7e731997d97da72392c9f68f98550e1332aa54bb

status/Jamfile

@@ -33,6 +33,7 @@ subinclude libs/smart_ptr/test ;         # test-suite smart_ptr
 subinclude libs/static_assert ;          # test-suite static_assert
 subinclude libs/thread/test ;            # test-suite thread
 subinclude libs/type_traits/test ;       # test-suite type_traits
+subinclude libs/variant/test ;           # test-suite variant
  
 
 # Tests specified in this Jamfile