Update struct signalfd_siginfo from Linux 4.18

[Joseph Myers]

This patch updates struct signalfd_siginfo in sys/signalfd.h with new
members from Linux 4.18 (plus ssi_addr_lsb, added to the kernel in
2.6.37 without being added to sys/signalfd.h at that time).  The
__pad2 member name follows the kernel and the existing __pad name.

Tested for x86_64.

2018-08-16  Joseph Myers  <joseph@codesourcery.com>

	* sysdeps/unix/sysv/linux/sys/signalfd.h (struct
	signalfd_siginfo): Add ssi_addr_lsb, ssi_syscall, ssi_call_addr
	and ssi_arch members.

diff --git a/sysdeps/unix/sysv/linux/sys/signalfd.h b/sysdeps/unix/sysv/linux/sys/signalfd.h
index f39eed5..ad46608 100644
--- a/sysdeps/unix/sysv/linux/sys/signalfd.h
+++ b/sysdeps/unix/sysv/linux/sys/signalfd.h
@@ -42,7 +42,12 @@ struct signalfd_siginfo
   uint64_t ssi_utime;
   uint64_t ssi_stime;
   uint64_t ssi_addr;
-  uint8_t __pad[48];
+  uint16_t ssi_addr_lsb;
+  uint16_t __pad2;
+  int32_t ssi_syscall;
+  uint64_t ssi_call_addr;
+  uint32_t ssi_arch;
+  uint8_t __pad[28];
 };
 
 __BEGIN_DECLS

-- 
Joseph S. Myers
joseph@codesourcery.com