Update to ELF Tool Chain snapshot at r3561

This update is primarily bug fixes in C++ symbol demangling, including:

- rvalue reference
- builtin type auto and decltype(auto)
- revamped support for function return types
- formatting fixes
- omit void when its the only param
- ref-qualifiers and others in function types
- type qualifiers in pointer-to-member function types
- incorrect handling regarding CV-qualifiers in function types
- ref-qualifier found in nested-name
- properly handle <name> ::= <substitute><template-args>
- make sure that nested function name is not a substitute candidate
- correctly handle expression in template args
- skip unknown substitution abbreviations

MFC after:	4 days

contrib/elftoolchain/elfdump/elfdump.c

@@ -50,7 +50,7 @@
 
 #include "_elftc.h"
 
-ELFTC_VCSID("$Id: elfdump.c 3497 2016-10-17 20:57:22Z emaste $");
+ELFTC_VCSID("$Id: elfdump.c 3521 2017-06-04 20:07:09Z jkoshy $");
 
 #if defined(ELFTC_NEED_ELF_NOTE_DEFINITION)
 #include "native-elf-format.h"
@@ -2226,8 +2226,8 @@ elf_print_svr4_hash64(struct elfdump *ed, struct section *s)
 	uint64_t	*buf;
 	uint64_t	*bucket, *chain;
 	uint64_t	 nbucket, nchain;
-	uint64_t	*bl, *c, maxl, total;
-	uint64_t	 i, j;
+	uint64_t	*bl, *c, j, maxl, total;
+	size_t		 i;
 	int		 elferr, first;
 	char		 idx[10];
 

contrib/elftoolchain/libelftc/_libelftc.h

@@ -24,7 +24,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- * $Id: _libelftc.h 3174 2015-03-27 17:13:41Z emaste $
+ * $Id: _libelftc.h 3531 2017-06-05 05:08:43Z kaiwang27 $
  */
 
 #ifndef	__LIBELFTC_H_
@@ -82,6 +82,8 @@ bool	vector_str_init(struct vector_str *_vs);
 bool	vector_str_pop(struct vector_str *_vs);
 bool	vector_str_push(struct vector_str *_vs, const char *_str,
     size_t _len);
+bool	vector_str_push_vector(struct vector_str *_dst,
+    struct vector_str *_org);
 bool	vector_str_push_vector_head(struct vector_str *_dst,
     struct vector_str *_org);
 char	*vector_str_substr(const struct vector_str *_vs, size_t _begin,

contrib/elftoolchain/libelftc/libelftc_vstr.c

@@ -33,7 +33,7 @@
 
 #include "_libelftc.h"
 
-ELFTC_VCSID("$Id: libelftc_vstr.c 2065 2011-10-26 15:24:47Z jkoshy $");
+ELFTC_VCSID("$Id: libelftc_vstr.c 3531 2017-06-05 05:08:43Z kaiwang27 $");
 
 /**
  * @file vector_str.c
@@ -280,6 +280,47 @@ vector_str_push_vector_head(struct vector_str *dst, struct vector_str *org)
 	return (true);
 }
 
+/**
+ * @brief Push org vector to the tail of det vector.
+ * @return false at failed, true at success.
+ */
+bool
+vector_str_push_vector(struct vector_str *dst, struct vector_str *org)
+{
+	size_t i, j, tmp_cap;
+	char **tmp_ctn;
+
+	if (dst == NULL || org == NULL)
+		return (false);
+
+	tmp_cap = (dst->size + org->size) * BUFFER_GROWFACTOR;
+
+	if ((tmp_ctn = malloc(sizeof(char *) * tmp_cap)) == NULL)
+		return (false);
+
+	for (i = 0; i < dst->size; ++i)
+		tmp_ctn[i] = dst->container[i];
+
+	for (i = 0; i < org->size; ++i)
+		if ((tmp_ctn[i + dst->size] = strdup(org->container[i])) ==
+		    NULL) {
+			for (j = 0; j < i + dst->size; ++j)
+				free(tmp_ctn[j]);
+
+			free(tmp_ctn);
+
+			return (false);
+		}
+
+	free(dst->container);
+
+	dst->container = tmp_ctn;
+	dst->capacity = tmp_cap;
+	dst->size += org->size;
+
+	return (true);
+}
+
 /**
  * @brief Get new allocated flat string from vector between begin and end.
  *