Add missing linkage specifiers, so that ha_innodb_plugin.so

will not export internal symbols.

storage/innodb_plugin/handler/ha_innodb.cc

@@ -1067,6 +1067,7 @@ mysqld.cc. We do a dirty read because for one there is no synchronization
 object and secondly there is little harm in doing so even if we get a torn
 read.
 @return	value of lower_case_table_names */
+static
 ulint
 innobase_get_lower_case_table_names(void)
 /*=====================================*/

storage/innodb_plugin/trx/trx0sys.c

@@ -129,7 +129,7 @@ static const ulint	FILE_FORMAT_NAME_N
 
 #ifdef UNIV_DEBUG
 /* Flag to control TRX_RSEG_N_SLOTS behavior debugging. */
-uint		trx_rseg_n_slots_debug = 0;
+UNIV_INTERN uint	trx_rseg_n_slots_debug = 0;
 #endif
 
 #ifndef UNIV_HOTBACKUP