New patches to fix hurd build.
D54079-hurd-openmp.diff, D54338-hurd-libcxx-threads-build.diff, D54339-hurd-libcxx-threads-detection.diff, D54378-hurd-triple.diff, D54379-hurd-triple-clang.diff, D54677-hurd-path_max.diff, hurd-cxx-paths.diff
D54079-hurd-openmp.diff, D54338-hurd-libcxx-threads-build.diff, D54339-hurd-libcxx-threads-detection.diff, D54378-hurd-triple.diff, D54379-hurd-triple-clang.diff, D54677-hurd-path_max.diff, hurd-cxx-paths.diff