added line for iostreams library

[SVN r26901]

status/Jamfile

@@ -27,6 +27,7 @@ subinclude libs/format/test ;              # test-suite format
 subinclude libs/function/test ;            # test-suite function
 subinclude libs/graph/test ;               # test-suite graph
 subinclude libs/io/test ;                  # test-suite io
+subinclude libs/iostreams/test ;           # test-suite iostreams
 subinclude libs/iterator/test ;            # test-suite iterator
 subinclude libs/logic/test ;               # test-suite logic
 subinclude libs/math/test ;                # test-suite math