Mark tokudb plugin as "Alpha" in MariaDB.

While it is stable on itself, the MariaDB integration
within 5.5 series is rather new.

storage/tokudb/hatoku_hton.cc

@@ -2541,7 +2541,7 @@ maria_declare_plugin(tokudb)
     toku_global_status_variables_export,  /* status variables */
     tokudb_system_variables,   /* system variables */
     TOKUDB_PLUGIN_VERSION_STR, /* string version */
-    MariaDB_PLUGIN_MATURITY_STABLE /* maturity */
+    MariaDB_PLUGIN_MATURITY_ALPHA /* maturity */
 },
 {
     MYSQL_INFORMATION_SCHEMA_PLUGIN, 
@@ -2556,7 +2556,7 @@ maria_declare_plugin(tokudb)
     NULL,                      /* status variables */
     NULL,                      /* system variables */
     TOKUDB_PLUGIN_VERSION_STR, /* string version */
-    MariaDB_PLUGIN_MATURITY_STABLE /* maturity */
+    MariaDB_PLUGIN_MATURITY_ALPHA /* maturity */
 },
 {
     MYSQL_INFORMATION_SCHEMA_PLUGIN, 
@@ -2571,7 +2571,7 @@ maria_declare_plugin(tokudb)
     NULL,                      /* status variables */
     NULL,                      /* system variables */
     TOKUDB_PLUGIN_VERSION_STR, /* string version */
-    MariaDB_PLUGIN_MATURITY_STABLE /* maturity */
+    MariaDB_PLUGIN_MATURITY_ALPHA /* maturity */
 },
 {
     MYSQL_INFORMATION_SCHEMA_PLUGIN, 
@@ -2586,7 +2586,7 @@ maria_declare_plugin(tokudb)
     NULL,                      /* status variables */
     NULL,                      /* system variables */
     TOKUDB_PLUGIN_VERSION_STR, /* string version */
-    MariaDB_PLUGIN_MATURITY_STABLE /* maturity */
+    MariaDB_PLUGIN_MATURITY_ALPHA /* maturity */
 },
 {
     MYSQL_INFORMATION_SCHEMA_PLUGIN, 
@@ -2601,7 +2601,7 @@ maria_declare_plugin(tokudb)
     NULL,                      /* status variables */
     NULL,                      /* system variables */
     TOKUDB_PLUGIN_VERSION_STR, /* string version */
-    MariaDB_PLUGIN_MATURITY_STABLE /* maturity */
+    MariaDB_PLUGIN_MATURITY_ALPHA /* maturity */
 },
 {
     MYSQL_INFORMATION_SCHEMA_PLUGIN, 
@@ -2616,7 +2616,7 @@ maria_declare_plugin(tokudb)
     NULL,                      /* status variables */
     NULL,                      /* system variables */
     TOKUDB_PLUGIN_VERSION_STR, /* string version */
-    MariaDB_PLUGIN_MATURITY_STABLE /* maturity */
+    MariaDB_PLUGIN_MATURITY_ALPHA /* maturity */
 }
 maria_declare_plugin_end;