Core/Database: Converted the database library to a shared library.

* There is still the possibility to static link against database.

(cherry picked from commit 6cfea2d8f7de3de8206a1f4cf23a6d653814afe1)

src/server/database/Database/Implementation/CharacterDatabase.h

@@ -566,7 +566,7 @@ enum CharacterDatabaseStatements
     MAX_CHARACTERDATABASE_STATEMENTS
 };
 
-class CharacterDatabaseConnection : public MySQLConnection
+class TC_DATABASE_API CharacterDatabaseConnection : public MySQLConnection
 {
 public:
     typedef CharacterDatabaseStatements Statements;