Fix builds with GCC 15

GCC 15 has more cleanups done in their include files, which results in
some declarations to be not indirectly brought into translation unit
anymore.

In this case there were errors in prefetch.h header about uint32_t
being undeclared. Let's include cstding header file to fix it.

Signed-off-by: Krzesimir Nowak <knowak@microsoft.com>

Author: krnowak

src/prefetch.h

@@ -16,6 +16,7 @@ limitations under the License.
 #pragma once
 
 #include <cctype>
+#include <cstdint>
 #include <string>
 #include <photon/fs/filesystem.h>