$(obj) might be defined either as a relative or an absolute path. Thus, it has
to be filtered out before adding $(top) to it (in case of an absolute path) when
building vboot. It is then provided separately in CFLAGS (as an absolute path).
In addition, VB2_LIB inherits $(obj), so it might also already be an absolute
path, and prefixing $(top) to it doesn't apply. Thus, the absolute path to it
should be passed to the vboot make command.
Change-Id: I13e893ebdf22c4513ee40d9331a30ac7de8f9788
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-on: http://review.coreboot.org/11120
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>