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/kcov.h b/libc/kernel/uapi/linux/kcov.h
index cf2660b..5b6f6b1 100644
--- a/libc/kernel/uapi/linux/kcov.h
+++ b/libc/kernel/uapi/linux/kcov.h
@@ -24,7 +24,7 @@
   __u32 area_size;
   __u32 num_handles;
   __aligned_u64 common_handle;
-  __aligned_u64 handles[0];
+  __aligned_u64 handles[];
 };
 #define KCOV_REMOTE_MAX_HANDLES 0x100
 #define KCOV_INIT_TRACE _IOR('c', 1, unsigned long)