clear_memory.c: Include missing <stdint.h>

Include the header so that we can reliably use uint8_t.

Bug: 357008987
Change-Id: Ibd8bee2cff63d3cb7a56f8b22ce1f7f75d0e0f1f
Reviewed-on: https://pigweed-review.googlesource.com/c/open-dice/+/250052
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Reviewed-by: Alice Wang <aliceywang@google.com>
Reviewed-by: Andrew Scull <ascull@google.com>
Pigweed-Auto-Submit: Pierre-Clément Tosi <ptosi@google.com>
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Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

src/clear_memory.c

diff --git a/src/clear_memory.c b/src/clear_memory.c
index 0fdc7cf..d8f5ca6 100644
--- a/src/clear_memory.c
+++ b/src/clear_memory.c
@@ -17,6 +17,8 @@
 // volatile data pointer. Attention has not been given to performance, clearing
 // caches or other potential side channels.
 
+#include <stdint.h>
+
 #include "dice/ops.h"
 
 void DiceClearMemory(void* context, size_t size, void* address) {