branches/zip: Hide some global variables that were accidentally not hidden

in r2276.  Now the following symbols will be exported when InnoDB is built
as a dynamic plugin:

* the virtual method pointer table of class ha_innodb
* the three variables that MySQL will reference when linking at runtime:

	_mysql_plugin_declarations_
	_mysql_plugin_interface_version_
	_mysql_sizeof_struct_st_plugin_

Furthermore, the following symbols are weak globals, to allow us to access
the built-in InnoDB in the mysqld executable, in case it contains a statically
linked InnoDB:

	builtin_innobase_plugin
	innodb_hton_ptr

data/data0type.c

@@ -38,7 +38,7 @@ this MySQL installation to this global variable. If we have < 4.1.2 format
 column definitions, or records in the insert buffer, we use this
 charset-collation code for them. */
 
-ulint	data_mysql_default_charset_coll		= 99999999;
+UNIV_INTERN ulint	data_mysql_default_charset_coll;
 
 /*************************************************************************
 Determine how many bytes the first n characters of the given string occupy.

handler/i_s.cc

@@ -373,7 +373,7 @@ static struct st_mysql_information_schema	i_s_info =
 	MYSQL_INFORMATION_SCHEMA_INTERFACE_VERSION
 };
 
-struct st_mysql_plugin	i_s_innodb_trx =
+UNIV_INTERN struct st_mysql_plugin	i_s_innodb_trx =
 {
 	/* the plugin type (a MYSQL_XXX_PLUGIN value) */
 	/* int */
@@ -648,7 +648,7 @@ innodb_locks_init(
 	DBUG_RETURN(0);
 }
 
-struct st_mysql_plugin	i_s_innodb_locks =
+UNIV_INTERN struct st_mysql_plugin	i_s_innodb_locks =
 {
 	/* the plugin type (a MYSQL_XXX_PLUGIN value) */
 	/* int */
@@ -831,7 +831,7 @@ innodb_lock_waits_init(
 	DBUG_RETURN(0);
 }
 
-struct st_mysql_plugin	i_s_innodb_lock_waits =
+UNIV_INTERN struct st_mysql_plugin	i_s_innodb_lock_waits =
 {
 	/* the plugin type (a MYSQL_XXX_PLUGIN value) */
 	/* int */
@@ -1171,7 +1171,7 @@ i_s_zip_reset_init(
 	DBUG_RETURN(0);
 }
 
-struct st_mysql_plugin	i_s_innodb_zip =
+UNIV_INTERN struct st_mysql_plugin	i_s_innodb_zip =
 {
 	/* the plugin type (a MYSQL_XXX_PLUGIN value) */
 	/* int */
@@ -1220,7 +1220,7 @@ struct st_mysql_plugin	i_s_innodb_zip =
 	STRUCT_FLD(__reserved1, NULL)
 };
 
-struct st_mysql_plugin	i_s_innodb_zip_reset =
+UNIV_INTERN struct st_mysql_plugin	i_s_innodb_zip_reset =
 {
 	/* the plugin type (a MYSQL_XXX_PLUGIN value) */
 	/* int */

trx/trx0i_s.c

@@ -152,7 +152,7 @@ struct trx_i_s_cache_struct {
 INFORMATION SCHEMA tables is fetched and later retrieved by the C++
 code in handler/i_s.cc. */
 static trx_i_s_cache_t	trx_i_s_cache_static;
-trx_i_s_cache_t*	trx_i_s_cache = &trx_i_s_cache_static;
+UNIV_INTERN trx_i_s_cache_t*	trx_i_s_cache = &trx_i_s_cache_static;
 
 /***********************************************************************
 For a record lock that is in waiting state retrieves the only bit that

ut/ut0rnd.c

@@ -18,7 +18,7 @@ Created 5/11/1994 Heikki Tuuri
 #define UT_RANDOM_3	1.0132677
 
 
-ulint	ut_rnd_ulint_counter = 65654363;
+UNIV_INTERN ulint	ut_rnd_ulint_counter = 65654363;
 
 /***************************************************************
 Looks for a prime number slightly greater than the given argument.