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>
diff --git a/include/part.h b/include/part.h
index 54b986c..797b542 100644
--- a/include/part.h
+++ b/include/part.h
@@ -8,7 +8,7 @@
 
 #include <blk.h>
 #include <ide.h>
-#include <uuid.h>
+#include <u-boot/uuid.h>
 #include <linker_lists.h>
 #include <linux/errno.h>
 #include <linux/list.h>