[glibc/google/grte/v5-2.27/master] Backport cl/98967227 to GRTE glibc 2.19 sources.

[Fangrui Song <maskray@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1a771e688fd70d331675f3641a2382fcc660e1a5

commit 1a771e688fd70d331675f3641a2382fcc660e1a5
Author: Brooks Moses <bmoses@google.com>
Date:   Fri Aug 14 22:32:51 2015 -0700

    Backport cl/98967227 to GRTE glibc 2.19 sources.

Diff:
---
 elf/link.h      | 8 ++++----
 socket/sys/un.h | 7 +++++--
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/elf/link.h b/elf/link.h
index c67a50dd8e..143d584db3 100644
--- a/elf/link.h
+++ b/elf/link.h
@@ -34,6 +34,8 @@
 #include <bits/elfclass.h>		/* Defines __ELF_NATIVE_CLASS.  */
 #include <bits/link.h>
 
+__BEGIN_DECLS
+
 /* Rendezvous structure used by the run-time dynamic linker to communicate
    details of shared object loading to the debugger.  If the executable's
    dynamic section has a DT_DEBUG element, the run-time linker sets that
@@ -162,8 +164,6 @@ struct dl_phdr_info
     void *dlpi_tls_data;
   };
 
-__BEGIN_DECLS
-
 extern int dl_iterate_phdr (int (*__callback) (struct dl_phdr_info *,
 					       size_t, void *),
 			    void *__data);
@@ -187,8 +187,8 @@ extern uintptr_t la_symbind64 (Elf64_Sym *__sym, unsigned int __ndx,
 			       unsigned int *__flags, const char *__symname);
 extern unsigned int la_objclose (uintptr_t *__cookie);
 
-__END_DECLS
-
 #endif
 
+__END_DECLS
+
 #endif /* link.h */
diff --git a/socket/sys/un.h b/socket/sys/un.h
index efc2194a3a..332ba0ecc7 100644
--- a/socket/sys/un.h
+++ b/socket/sys/un.h
@@ -23,6 +23,11 @@
 /* Get the definition of the macro to define the common sockaddr members.  */
 #include <bits/sockaddr.h>
 
+#ifdef __USE_MISC
+# include <stddef.h>		/* For offsetof.  */
+# include <string.h>		/* For prototype of `strlen'.  */
+#endif
+
 __BEGIN_DECLS
 
 /* Structure describing the address of an AF_LOCAL (aka AF_UNIX) socket.  */
@@ -34,8 +39,6 @@ struct sockaddr_un
 
 
 #ifdef __USE_MISC
-# include <string.h>		/* For prototype of `strlen'.  */
-
 /* Evaluate to actual length of the `sockaddr_un' structure.  */
 # define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path)	      \
 		      + strlen ((ptr)->sun_path))