Boost Patch update

Boost Patch update
  This update follows after the previous update[1]
  Due to the Boost Dev patch submited in [2], this commit also updates
    the boost patch in order to, instead of excluding all architectures
    that do not support -m32 and -m64 options, it now includes only the
    architectures that do support it.

 [1]: https://github.com/openwrt/packages/pull/1186
 [2]: https://github.com/boostorg/build/pull/76

 Signed-off-by: Carlos M. Ferreira carlosmf.pt@gmail.com