boost: 1.69.0 -> 1.71.0

bmcweb requires boost 1.71 or newer, and it could be better to provide
bmcweb's necessary environment in local CI, so that it could be built
without 3rd-party dependencies.

Tested: Build bmcweb in local CI with YOCTO_DEPENDENCIES enabled.

Signed-off-by: Lei YU <mine260309@gmail.com>
Change-Id: I01710951b3b8aa157d6c2708d1d3ae804f6aa890
1 file changed