SeaBIOS: fix reproducible build by defining our own version string

SeaBIOS uses a version string which is derived from hostname.
Defining our own version strings drops this dependency.
This only works in versions newer than rel-1.8.0-36-g624e812.

Change-Id: Ie800deffd3706d1b2dabf5258e2e48bfcd2929b7
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-on: http://review.coreboot.org/10515
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins)
1 file changed