Update glibc headers for Linux 4.5.

This patch updates the glibc headers with the defines MADV_FREE,
IPV6_HDRINCL and EPOLLEXCLUSIVE that are added in Linux 4.5.

Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by the patch).

	* bits/mman-linux.h [__USE_MISC] (MADV_FREE): New macro.
	* sysdeps/unix/sysv/linux/hppa/bits/mman.h [__USE_MISC]
	(MADV_FREE): Likewise.
	* sysdeps/unix/sysv/linux/bits/in.h (IPV6_HDRINCL): Likewise.
	* sysdeps/unix/sysv/linux/sys/epoll.h (enum EPOLL_EVENTS): Add
	EPOLLEXCLUSIVE.

ChangeLog

@@ -1,3 +1,12 @@
+2016-03-14  Joseph Myers  <joseph@codesourcery.com>
+
+	* bits/mman-linux.h [__USE_MISC] (MADV_FREE): New macro.
+	* sysdeps/unix/sysv/linux/hppa/bits/mman.h [__USE_MISC]
+	(MADV_FREE): Likewise.
+	* sysdeps/unix/sysv/linux/bits/in.h (IPV6_HDRINCL): Likewise.
+	* sysdeps/unix/sysv/linux/sys/epoll.h (enum EPOLL_EVENTS): Add
+	EPOLLEXCLUSIVE.
+
 2016-03-14  Carlos O'Donell  <carlos@redhat.com>
 
 	* timezone/README: Remove mention of checktab.awk. Mention wiki

bits/mman-linux.h

@@ -81,6 +81,7 @@
 # define MADV_SEQUENTIAL  2	/* Expect sequential page references.  */
 # define MADV_WILLNEED	  3	/* Will need these pages.  */
 # define MADV_DONTNEED	  4	/* Don't need these pages.  */
+# define MADV_FREE	  8	/* Free pages only if memory pressure.  */
 # define MADV_REMOVE	  9	/* Remove these pages and resources.  */
 # define MADV_DONTFORK	  10	/* Do not inherit across fork.  */
 # define MADV_DOFORK	  11	/* Do inherit across fork.  */

sysdeps/unix/sysv/linux/bits/in.h

@@ -184,6 +184,7 @@ struct in_pktinfo
 #define IPV6_LEAVE_ANYCAST	28
 #define IPV6_IPSEC_POLICY	34
 #define IPV6_XFRM_POLICY	35
+#define IPV6_HDRINCL		36
 
 /* Advanced API (RFC3542) (1).  */
 #define IPV6_RECVPKTINFO	49

sysdeps/unix/sysv/linux/hppa/bits/mman.h

@@ -88,6 +88,7 @@
 # define MADV_SPACEAVAIL  5	/* Insure that resources are reserved */
 # define MADV_VPS_PURGE	  6	/* Purge pages from VM page cache */
 # define MADV_VPS_INHERIT 7	/* Inherit parents page size */
+# define MADV_FREE	  8	/* Free pages only if memory pressure.  */
 # define MADV_REMOVE	  9	/* Remove these pages and resources.  */
 # define MADV_DONTFORK	 10	/* Do not inherit across fork.  */
 # define MADV_DOFORK	 11	/* Do inherit across fork.  */

sysdeps/unix/sysv/linux/sys/epoll.h

@@ -61,6 +61,8 @@ enum EPOLL_EVENTS
 #define EPOLLHUP EPOLLHUP
     EPOLLRDHUP = 0x2000,
 #define EPOLLRDHUP EPOLLRDHUP
+    EPOLLEXCLUSIVE = 1u << 28,
+#define EPOLLEXCLUSIVE EPOLLEXCLUSIVE
     EPOLLWAKEUP = 1u << 29,
 #define EPOLLWAKEUP EPOLLWAKEUP
     EPOLLONESHOT = 1u << 30,