Update to kernel headers v5.3.2.

Test: Builds and run unit tests on taimen/cuttlefish.
Change-Id: I6ebd8f179d159ac974555e8edca588083e8081b3
diff --git a/libc/kernel/uapi/drm/drm.h b/libc/kernel/uapi/drm/drm.h
index 66adf99..7c5ffbb 100644
--- a/libc/kernel/uapi/drm/drm.h
+++ b/libc/kernel/uapi/drm/drm.h
@@ -23,6 +23,7 @@
 #include <asm/ioctl.h>
 typedef unsigned int drm_handle_t;
 #else
+#include <stdint.h>
 #include <sys/ioccom.h>
 #include <sys/types.h>
 typedef int8_t __s8;