Update to v5.8 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.8

Test: NA
Change-Id: I2231c877589820fc09800a200cf4ac62ba74b04c
diff --git a/libc/kernel/uapi/linux/gfs2_ondisk.h b/libc/kernel/uapi/linux/gfs2_ondisk.h
index 7d03ba5..a8fb59e 100644
--- a/libc/kernel/uapi/linux/gfs2_ondisk.h
+++ b/libc/kernel/uapi/linux/gfs2_ondisk.h
@@ -117,6 +117,11 @@
 #define GFS2_RGF_DATAONLY 0x00000004
 #define GFS2_RGF_NOALLOC 0x00000008
 #define GFS2_RGF_TRIMMED 0x00000010
+struct gfs2_inode_lvb {
+  __be32 ri_magic;
+  __be32 __pad;
+  __be64 ri_generation_deleted;
+};
 struct gfs2_rgrp_lvb {
   __be32 rl_magic;
   __be32 rl_flags;