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>
diff --git a/Makefile b/Makefile
index 9d174e0..b41057c 100644
--- a/Makefile
+++ b/Makefile
@@ -38,8 +38,6 @@
 	$< $(XGCCPATH) > $@.tmp
 	\mv -f $@.tmp $@ 2> /dev/null
 
-include .xcompile
-
 export top := $(CURDIR)
 export src := src
 export srck := $(top)/util/kconfig
@@ -122,6 +120,8 @@
 
 include $(HAVE_DOTCONFIG)
 
+include .xcompile
+
 ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
 # FIXME: armv7/aarch64 won't build right now
 # NOTE: clang puts compiler-rt under lib/linux/libclang_rt.builtins-i386.a