Update to v5.13 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.13

Test: Builds, bionic unit tests.
Change-Id: Ia4360ca4a2808206f64187dcb234d73c5752624b
diff --git a/libc/kernel/uapi/linux/kfd_ioctl.h b/libc/kernel/uapi/linux/kfd_ioctl.h
index 73ef5de..f3c6176 100644
--- a/libc/kernel/uapi/linux/kfd_ioctl.h
+++ b/libc/kernel/uapi/linux/kfd_ioctl.h
@@ -21,7 +21,7 @@
 #include <drm/drm.h>
 #include <linux/ioctl.h>
 #define KFD_IOCTL_MAJOR_VERSION 1
-#define KFD_IOCTL_MINOR_VERSION 3
+#define KFD_IOCTL_MINOR_VERSION 4
 struct kfd_ioctl_get_version_args {
   __u32 major_version;
   __u32 minor_version;
@@ -244,6 +244,7 @@
 #define KFD_IOC_ALLOC_MEM_FLAGS_NO_SUBSTITUTE (1 << 28)
 #define KFD_IOC_ALLOC_MEM_FLAGS_AQL_QUEUE_MEM (1 << 27)
 #define KFD_IOC_ALLOC_MEM_FLAGS_COHERENT (1 << 26)
+#define KFD_IOC_ALLOC_MEM_FLAGS_UNCACHED (1 << 25)
 struct kfd_ioctl_alloc_memory_of_gpu_args {
   __u64 va_addr;
   __u64 size;