build system: Move .xcompile include further down

It's not used until then, but by moving it below including .config,
we can use CONFIG_* in the .xcompile file in the future.

Change-Id: I672f444dd28b5fae1fc339a1e0e78a249c9b7875
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/10422
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
1 file changed