[boost] [Git] Modularization of Boost.Any, Boost.Array, and Boost.StaticAssert

Hi, according to our preliminary modularization, the candidates Boost.Any, Boost.Array, and Boost.StaticAssert each have their own repository, even though each of them consists of a single header file only (disregarding tests, examples and documentation). I propose to put all three of them into the Boost.Utility repository. Comments? --Daniel