Kokkos: Mark HWLOC as a TriBITS TPL as well (#11938)

It was reported by a Trilinos user in #11938 that after removing Kokkos
subpackages that their build of Trilinos failed and by marking 'HWLOC' as a
TriBITS TPL this fixed the problem.  HWLOC has always been a TriBITS TPL so it
is not quite clear how this worked before this.

packages/kokkos/cmake/kokkos_tpls.cmake

@@ -31,7 +31,7 @@ FUNCTION(KOKKOS_TPL_OPTION PKG DEFAULT)
   ENDIF()
 ENDFUNCTION()
 
-KOKKOS_TPL_OPTION(HWLOC   Off)
+KOKKOS_TPL_OPTION(HWLOC   Off TRIBITS HWLOC)
 KOKKOS_TPL_OPTION(LIBNUMA Off)
 KOKKOS_TPL_OPTION(MEMKIND Off)
 IF(KOKKOS_ENABLE_MEMKIND)