tree b0aae16b8fb0041fdf4cd63441ec50f2cfbb79a3
parent e1118bcb2dbb64e90ac5671f7978d4748d0a5e3b
author Patrick Venture <venture@google.com> 1560959144 -0700
committer Patrick Venture <venture@google.com> 1560965921 -0700

bmc: add cleanup blob handler

Add a cleanup blob handler, such that there is a new blob id present
named "/flash/cleanup" that will delete temporary files.  This blob
handler expects a client to open/commit/close the blob.  This blob
handler will delete files that are specified as temporary.  The host
client may use this to clean up artifacts on verification or update
failure.

This can be extended later to handle calling a service or doing anything
else to cleanup.  The cleanup handler will be added if
--enable-cleanup-delete.  The recipe will automatically add this blob
handler if that configure variable is set.

Tested: Not tested on real hardware.
Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I4502b2613e38f0a947d7235d084287376c6b0ce1