apphandler: Add "System Name" System Info parameter

Use the BMC's hostname to respond to requests for the "System Name"
parameter.

Signed-off-by: Xo Wang <xow@google.com>
Change-Id: I23845aab6091a0d003b6f8370d2b67fc11e580e8
Signed-off-by: Patrick Venture <venture@google.com>
1 file changed