Uninclude source files for specific configurations to prevent link warning.

[gmackey]

There are three possible configuration that generate warnings about object files with no symbols when linking the kokkos library file. The errors are because all of the code in the source files is commented out due to defines not being defined. The configurations and files that need to be removed from the build are:

1. When the Serial device is not enabled.
   • core/src/impl/Kokkos_Serial.cpp
   • core/src/impl/Kokkos_Serial_Task.cpp
2. When profiling is disabled.
   • core/src/impl/Kokkos_Profiling_Interface.cpp
3. When memkind is turned off.
   • core/src/impl/Kokkos_HBWSpace.cpp

The fix is to remove the offending files from the compile when it is one of the three configurations.

[gmackey]

This fix is included in my cmake branch and will be pulled in with that branch.

[gmackey]

The fix is in both Makefile.kokkos and in the pure CMake build.