Makefile.inc: Extend version string for timeless builds

With the version string "TIMELESS", binaries are slightly smaller than
for a regular build. This may lead to false positive build tests if the
space is limited (e.g. bootblock). So let's make the string a little
longer.

Change-Id: I3bbf6f71d5bcd74728a3fe39734312690901d0ec
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32986
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

Makefile.inc

@@ -31,7 +31,7 @@ CONFIG_OVERRIDE_DEVICETREE:=$(call strip_quotes, $(CONFIG_OVERRIDE_DEVICETREE))
 # misleadingly named, this is the coreboot version
 ifeq ($(KERNELVERSION),)
 ifeq ($(BUILD_TIMELESS),1)
-KERNELVERSION := TIMELESS
+KERNELVERSION := -TIMELESS--LESSTIME-
 else
 KERNELVERSION := $(strip $(if $(GIT),\
 	$(shell git describe --dirty --always || git describe),\