Fixed errors and compiler warnings found by buildbot

Solaris fixes:
- Fixed that wait_timeout_func and wait_timeout tests works on solaris
- We have to compile without NO_ALARM on Solaris as Solaris doesn't support timeouts on sockets with setsockopt(.. SO_RCVTIMEO).
- Fixed that compile-solaris-amd64-debug works (before that we got a wrong ELF class: ELFCLASS64 on linkage)
- Added missing sync_with_master
Other bug fixes:
- Free memory for rpl_global_gtid_binlog_state before exit() to avoid 'accessing uninitalized mutex' error.



BUILD/FINISH.sh:
  Fixed issues on Solaris with ksh
BUILD/compile-solaris-amd64-debug:
  Added missing -m64 flag
configure.cmake:
  We have to compile without NO_ALARM on Solaris as Solaris doesn't support timeouts on sockets with setsockopt(.. SO_RCVTIMEO)
mysql-test/suite/rpl/t/rpl_gtid_mdev4473.test:
  - Added missing sync_with_master (fix by knielsen)
sql-common/client.c:
  Added () to get rid of compiler warning
sql/item_strfunc.cc:
  Fixed compiler warning
sql/log.cc:
  Free memory for static variable rpl_global_gtid_binlog_state before exit()
  - If we are compiling with safemalloc, we would try to call sf_free() for some members after sf_terminate() was called, which would result of trying to access the uninitalized mutex 'sf_mutex'
sql/multi_range_read.cc:
  Fixed compiler warnings of converting double to ulong.
sql/opt_range.cc:
  Fixed compiler warnings of converting double to ulong or uint
  - Better to have all variables that can be number of rows as 'ha_rows'
sql/rpl_gtid.cc:
  Added rpl_binlog_state::free() to be able to free memory for static objects before exit()
sql/rpl_gtid.h:
  Added rpl_binlog_state::free() to be able to free memory for static objects before exit()
sql/set_var.cc:
  Fixed compiler warning
sql/sql_join_cache.cc:
  Fixed compiler warnings of converting double to uint
sql/sql_show.cc:
  Added cast to get rid of compiler warning
sql/sql_statistics.cc:
  Remove code that didn't do anything.
  (store_record() with record[0] is a no-op)
storage/xtradb/os/os0file.c:
  Added  __attribute__ ((unused))
support-files/compiler_warnings.supp:
  Ignore warnings from atomic_add_64_nv
  (was not able to fix this with a cast as the macro is a bit different between systems)
vio/viosocket.c:
  Added more DBUG_PRINT

sql/sql_join_cache.cc

@@ -3812,8 +3812,8 @@ uint JOIN_TAB_SCAN_MRR::aux_buffer_incr(ulong recno)
   uint incr= 0;
   TABLE_REF *ref= &join_tab->ref;
   TABLE *tab= join_tab->table;
-  uint rec_per_key=
-    tab->key_info[ref->key].actual_rec_per_key(ref->key_parts-1);
+  ha_rows rec_per_key=
+    (ha_rows) tab->key_info[ref->key].actual_rec_per_key(ref->key_parts-1);
   set_if_bigger(rec_per_key, 1);
   if (recno == 1)
     incr=  ref->key_length + tab->file->ref_length;