bmc: use c++11 compatible lambda search
bmc: use c++11 compatible lambda search

[&blob](const auto& iter) { return (iter == blob); });
              ^~~~

Signed-off-by: Patrick Venture <36c53fa43f47f3fd67cb2fc38031827244d18a1f@google.com>
Change-Id: I0f6a833ec6fb2415a2741469c8ba10933936e5f7

openbmc/phosphor-ipmi-flash