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/connector.h b/libc/kernel/uapi/linux/connector.h
index adf3a7f..e3891e3 100644
--- a/libc/kernel/uapi/linux/connector.h
+++ b/libc/kernel/uapi/linux/connector.h
@@ -50,6 +50,6 @@
   __u32 ack;
   __u16 len;
   __u16 flags;
-  __u8 data[0];
+  __u8 data[];
 };
 #endif