dbus-sensors: srcrev bump 8fb0a0138f..961bf09a2c

James Feist (2):
      ipmbsensor: simplify reading
      Standardize read errors

(From meta-phosphor rev: ee67f60b52ce1cdfde74901001739614d2c6baa3)

Change-Id: I49402d874ae471e0c46729c724d25f8f476bd479
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>