third_party/nimble: pull fixes for some advertising issues
See https://github.com/apache/mynewt-nimble/pull/2052 for the proposal
submitted upstream (it will likely require adjustments, but fixes some
immediate issues for now).
Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>
Signed-off-by: Liam McLoughlin <lmcloughlin@google.com>