tree a0dc0c4b5eda4883cc54242759f3088f05724c34
parent 9420ad20777cb28acd5c66c3c4dd75a17b8364e2
author Patrick Venture <venture@google.com> 1557961086 -0700
committer Patrick Venture <venture@google.com> 1557961672 -0700

tools: implement firmware verification polling

The verification process is asynchronous, therefore poll the BMC
firmware state.

Tested: Verified it behaves as intended, before moving it into a
sub-routine:

Opening the verification file
Committing to verification file to trigger verification service
Calling stat on verification session to check status
stat received:
	blob_state: 0x206
	size: 0x0
	metadata(1): 0x3
	other
stat received:
	blob_state: 0x206
	size: 0x0
	metadata(1): 0x0
	running
stat received:
	blob_state: 0x206
	size: 0x0
	metadata(1): 0x0
	running
stat received:
	blob_state: 0x206
	size: 0x0
	metadata(1): 0x1
	success
stat received:
	blob_state: 0x206
	size: 0x0
	metadata(1): 0x1
	success

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I3cb13d1a966c2c833fd4fee5654332f34e80355a