Fixes to get valgrind to work with jemalloc

- Added MALLOC_LIBRARY variable to hold name of malloc library
- Back ported valgrind related fixes from jemalloc 3.4.1 to the included jemalloc 3.3.1
- Renamed bitmap_init() and bitmap_free() to my_bitmap_init() and my_bitmap_free() to avoid clash with jemalloc 3.4.1
- Use option --soname-synonyms=somalloc=NON to valgrind when using jemalloc
- Show version related variables in mysqld --help
  -- Added SHOW_VALUE_IN_HELP marker

Increased back_log to 150 as the original value was a bit too small


CMakeLists.txt:
  Added MALLOC_LIBRARY variable to hold name of malloc library
cmake/jemalloc.cmake:
  Added MALLOC_LIBRARY variable to hold name of malloc library
config.h.cmake:
  Added MALLOC_LIBRARY variable to hold name of malloc library
extra/jemalloc/ChangeLog:
  Updates changelog
extra/jemalloc/include/jemalloc/internal/arena.h:
  Backported valgrind fixes from jemalloc 3.4.1
extra/jemalloc/include/jemalloc/internal/jemalloc_internal.h.in:
  Backported valgrind fixes from jemalloc 3.4.1
extra/jemalloc/include/jemalloc/internal/private_namespace.h:
  Backported valgrind fixes from jemalloc 3.4.1
extra/jemalloc/include/jemalloc/internal/tcache.h:
  Backported valgrind fixes from jemalloc 3.4.1
extra/jemalloc/src/arena.c:
  Backported valgrind fixes from jemalloc 3.4.1
include/my_bitmap.h:
  Renamed bitmap_init() and bitmap_free() to my_bitmap_init() and my_bitmap_free() to avoid clash with jemalloc 3.4.1
mysql-test/mysql-test-run.pl:
  Use option --soname-synonyms=somalloc=NON to valgrind when using jemalloc
mysql-test/valgrind.supp:
  Supression of memory leak in OpenSuse 12.3
mysys/my_bitmap.c:
  Renamed bitmap_init() and bitmap_free() to my_bitmap_init() and my_bitmap_free()
sql/ha_ndbcluster_binlog.cc:
  Renames
sql/ha_ndbcluster_cond.h:
  Renames
sql/ha_partition.cc:
  Renames
sql/handler.cc:
  Renames
sql/item_subselect.cc:
  Renames
sql/log_event.cc:
  Renames
sql/log_event_old.cc:
  Renames
sql/mysqld.cc:
  Renames
  Show version related variables in mysqld --help
sql/opt_range.cc:
  Renames
sql/opt_table_elimination.cc:
  Renames
sql/partition_info.cc:
  Renames
sql/rpl_injector.h:
  Renames
sql/set_var.h:
  Renames
sql/slave.cc:
  Renames
sql/sql_bitmap.h:
  Renames
sql/sql_insert.cc:
  Renames
sql/sql_lex.h:
  Renames
sql/sql_parse.cc:
  Renames
sql/sql_partition.cc:
  Renames
sql/sql_select.cc:
  Renames
sql/sql_show.cc:
  Renames
sql/sql_update.cc:
  Renames
sql/sys_vars.cc:
  Show version related variables in mysqld --help
sql/sys_vars.h:
  Added SHOW_VALUE_IN_HELP marker for variables that should be shown in --help
sql/table.cc:
  Renames
sql/table.h:
  Removed not used bitmap_init_value
storage/connect/ha_connect.cc:
  Removed compiler warning
storage/maria/ma_open.c:
  Renames
unittest/mysys/bitmap-t.c:
  Renames

sql/sql_bitmap.h

@@ -34,7 +34,7 @@ public:
   Bitmap() { init(); }
   Bitmap(const Bitmap& from) { *this=from; }
   explicit Bitmap(uint prefix_to_set) { init(prefix_to_set); }
-  void init() { bitmap_init(&map, buffer, default_width, 0); }
+  void init() { my_bitmap_init(&map, buffer, default_width, 0); }
   void init(uint prefix_to_set) { init(); set_prefix(prefix_to_set); }
   uint length() const { return default_width; }
   Bitmap& operator=(const Bitmap& map2)
@@ -52,7 +52,7 @@ public:
   void intersect(ulonglong map2buff)
   {
     MY_BITMAP map2;
-    bitmap_init(&map2, (uint32 *)&map2buff, sizeof(ulonglong)*8, 0);
+    my_bitmap_init(&map2, (uint32 *)&map2buff, sizeof(ulonglong)*8, 0);
     bitmap_intersect(&map, &map2);
   }
   /* Use highest bit for all bits above sizeof(ulonglong)*8. */