libpldm: srcrev bump e20b5eaae0..0970e332b4

Andrew Jeffery (1):
      libpldm: Bump to v0.2.0

Thu Nguyen (2):
      Correct the compact numeric sensor pdr struct name
      Add day/week/month/year occurrence rate

Change-Id: Icf161544cfa845731be49b717cab302ef9d57c97
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>