more ublas test problems

From: Benedikt Weber (yg-boost-users_at_[hidden])
Date: 2003-05-15 11:59:44

When compling the bench* tests for ublas using the jamfiles, both cwpro8 and
borland do not seem to know about the function rand(). I think that
<stdlib.h> should be included somewhere. MSVC seems to do this implicitely.

Furthermore, only debug versions are generated for all tests (test* and
bench*).

Benedikt