fix(uuid): add missing `#include` directives

These include directives were missing from both `uuid.h` files.

Change-Id: I875dfda3e0985728277b72f0e7597dde5cf9d304
Signed-off-by: Chris Kay <chris.kay@arm.com>
diff --git a/common/uuid.c b/common/uuid.c
index 3e47eb4..969eda1 100644
--- a/common/uuid.c
+++ b/common/uuid.c
@@ -1,12 +1,11 @@
 /*
- * Copyright (c) 2021-2022, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2021-2023, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include <assert.h>
 #include <errno.h>
-#include <stdint.h>
 #include <string.h>
 
 #include <common/debug.h>