This commit updates Boost to version 1.72.0
    There are no new libraries in this release.

    Note:
    - This commit also adds a post-release patch to fix an issue
    with Boost.Coroutine

    More info about Boost 1.72.0 can be found at the usual place [1].

    [1]: https://www.boost.org/users/history/version_1_72_0.html

Signed-off-by: Carlos Miguel Ferreira <carlosmf.pt@gmail.com>

The issue was that the pause instruction was emitted through an asm
directive which was not correct for some mips platforms.

Simplified boost-fiber-exclude as a result.

Removed uClibc-ng math patch. It was not correct as it broke float and
long double support (std variants use function overloads). A different
solution was applied upstream. As it's quite annoying to backport, just
wait until a new release comes with that change. ARC as a platform is
barely supported anyways.

Swapped asio patch for the upstream submission, which is unfortunately, in
limbo.

Refreshed remaining patch.

Signed-off-by: Rosen Penev <rosenp@gmail.com>