3rdparty: Move to blobs

To move 3rdparty to 3rdparty/blobs (ie. below itself
from git's broken perspective), we need to work around
it - since some git implementations don't like the direct
approach.

Change-Id: I1fc84bbb37e7c8c91ab14703d609a739b5ca073c
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10108
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/cpu/intel/model_6xx/microcode_blob.c

@@ -1,3 +1,3 @@
 unsigned microcode_updates_6xx[] = {
-	#include "../../../../3rdparty/cpu/intel/model_6xx/microcode.h"
+	#include "../../../../blobs/cpu/intel/model_6xx/microcode.h"
 };