Remove contrib/windows/
Merge hwlocXYZ/hwloc/README-ompi.txt back into hwlocXYZ/README-ompi.txt instead of having both.
Add README.txt in new automake-required directory contrib/systemd/
Keep the following patches applied since they are not in 1.11.3
linux: actually enable libudev based on the result of AC_CHECK_LIB
(cherry picked from open-mpi/hwloc@9549fd59af)
configure: check the actual may_alias syntax that we use
(cherry picked from open-mpi/hwloc@0ab7af5e90)
