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/cmd/nvedit_efi.c b/cmd/nvedit_efi.c
index 64ae2ad..32b7d04 100644
--- a/cmd/nvedit_efi.c
+++ b/cmd/nvedit_efi.c
@@ -15,7 +15,7 @@
 #include <malloc.h>
 #include <mapmem.h>
 #include <rtc.h>
-#include <uuid.h>
+#include <u-boot/uuid.h>
 #include <linux/kernel.h>
 
 /*