Workaround TPM_E_INVALID_KEYHANDLE error when evicting keys.

BUG=chrome-os-partner:14945
TEST=Ran platform_TPMEvict autotest.

Change-Id: I39c2f600b37d53e6436251728991bb981c8e34ea
Reviewed-on: https://gerrit.chromium.org/gerrit/36374
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Commit-Ready: Darren Krahn <dkrahn@chromium.org>
Tested-by: Darren Krahn <dkrahn@chromium.org>
1 file changed