Update to v6.0 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-6.0

Test: Boots on coral.
Test: Bionic unit tests pass.
Change-Id: I282de83f23b432bef58214108a93700bdadddf0f
diff --git a/libc/kernel/uapi/linux/fiemap.h b/libc/kernel/uapi/linux/fiemap.h
index 4310786..a67a5fe 100644
--- a/libc/kernel/uapi/linux/fiemap.h
+++ b/libc/kernel/uapi/linux/fiemap.h
@@ -34,7 +34,7 @@
   __u32 fm_mapped_extents;
   __u32 fm_extent_count;
   __u32 fm_reserved;
-  struct fiemap_extent fm_extents[0];
+  struct fiemap_extent fm_extents[];
 };
 #define FIEMAP_MAX_OFFSET (~0ULL)
 #define FIEMAP_FLAG_SYNC 0x00000001