Add --valgrind to VERSION() string for valgrind builds

Fixes main.sp-no-valgrind for valgrind builds not done with BUILD scripts

sql/mysqld.cc

@@ -9038,10 +9038,12 @@ void set_server_version(char *buf, size_t size)
 {
   bool is_log= opt_log || global_system_variables.sql_log_slow || opt_bin_log;
   bool is_debug= IF_DBUG(!strstr(MYSQL_SERVER_SUFFIX_STR, "-debug"), 0);
+  bool is_valgrind= IF_VALGRIND(!strstr(MYSQL_SERVER_SUFFIX_STR, "-valgrind"), 0);
   strxnmov(buf, size - 1,
            MYSQL_SERVER_VERSION,
            MYSQL_SERVER_SUFFIX_STR,
            IF_EMBEDDED("-embedded", ""),
+           is_valgrind ? "-valgrind" : "",
            is_debug ? "-debug" : "",
            is_log ? "-log" : "",
            NullS);