[PATCH] dma_buf_allocator.h: Fix build with gcc-15

[tho3.nguyen]

To fix:
...
In file included from ../git/src/libcamera/dma_buf_allocator.cpp:9:
../git/include/libcamera/internal/dma_buf_allocator.h:66:19: error: 'uint64_t' has not been declared
   66 |         void sync(uint64_t step);
      |                   ^~~~~~~~
../git/include/libcamera/internal/dma_buf_allocator.h:17:1: note: 'uint64_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
...

Signed-off-by: tho3.nguyen <tho3.nguyen at lge.com>
---
 include/libcamera/internal/dma_buf_allocator.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/libcamera/internal/dma_buf_allocator.h b/include/libcamera/internal/dma_buf_allocator.h
index 13600915..c22b9bbd 100644
--- a/include/libcamera/internal/dma_buf_allocator.h
+++ b/include/libcamera/internal/dma_buf_allocator.h
@@ -11,6 +11,7 @@
 #include <stdint.h>
 #include <string>
 #include <vector>
+#include <cstdint>
 
 #include <libcamera/base/flags.h>
 #include <libcamera/base/shared_fd.h>
-- 
2.34.1