Amesos2_Umfpack_FunctionMap.hpp: remove the namespace from umfpack sy…
Created by: prwolfe
…mbols
In order to support umfpack 4.1 for sierra I had to remove the namespace wrapped around the include of "umfpack.h" and restore the extern "C" statement. Sierra will be working on getting a more current UMFPACK and the framework team will get testing for this into the trilinos cdash board.