Fix keyname generation issue

The keyname binded to keyring return a wrong string when there are binary char larger than 127,
the sign extension will introduce unexpect FFFFFF string to the keyname.

Bug: 36975893
Test: local build

Change-Id: Iba2f6ef95aeacd08c8d6c72b71e7b92e956ec3fc
Signed-off-by: Ai, Ting A <ting.a.ai@intel.com>
1 file changed