Recommended update for boost-legacy

This update for boost-legacy fixes the following issues:

Create a new boost-legacy package with version 1.66.0. (bsc#1175886, jsc#SLE-17304, jsc#ECO-3147)

- Remove duplicate license package that we get from original Boost
- Add a backport of `Boost.Optional::has_value()` for LibreOffice
- Use `%license` instead of `%doc` (bsc#1082318)
- Multibuild requires versioned `Name: tag` . (bsc#1076640)

Changes in version 1.66.0:

- `Beast`: new portable HTTP, WebSocket and network operations using `Boost.Asio`. Header-only library.
- `Callable Traits`: new library and successor to `Boost.FunctionTypes`. Header-only library.
- `Mp11:` new metaprogramming library
- ` Asio`:
- implemented interface changes to reflect the Networking TS (N4656)
- functions and classes that have been superseded by Networking TS functionality have been deprecated.
- added support for customized handler tracking
- removed previously deprecated functions
- `Atomic`: improved compatibility with GCC 7. 128-bit operations on `x86_64` no longer require linking
with compiled library.
- `DateTime`: Fixed an integral overflow that could cause incorrect results when adding or subtracting
many years from a date.
- `Format`: New format specifiers added and volatile arguments can not be safely used with operator`%`
- `Fusion`:
- fix compile error with `std::array`
- remove circular preprocessor include
- `PolyCollection`: backported to GCC 4.8 and 4.9 with some limitations
- `Uuid`: added `RTF-4122` namespaces in `boost::uuids::ns`