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/usb/audio.h b/libc/kernel/uapi/linux/usb/audio.h
index 7d36157..bfda540 100644
--- a/libc/kernel/uapi/linux/usb/audio.h
+++ b/libc/kernel/uapi/linux/usb/audio.h
@@ -186,7 +186,7 @@
   __u8 bUnitID;
   __u8 bSourceID;
   __u8 bControlSize;
-  __u8 bmaControls[0];
+  __u8 bmaControls[];
 } __attribute__((packed));
 struct uac_processing_unit_descriptor {
   __u8 bLength;