include: export uuid.h

Move this header to include/u-boot/ so that it can be used by external
tools.

Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>

lib/fwu_updates/fwu_mtd.c

@@ -10,7 +10,7 @@
 #include <log.h>
 #include <malloc.h>
 #include <mtd.h>
-#include <uuid.h>
+#include <u-boot/uuid.h>
 #include <stdio.h>
 
 #include <dm/ofnode.h>