[core][test] fix leaks from sqlite usage

platform/default/src/mbgl/storage/sqlite3.cpp

@@ -125,6 +125,7 @@ mapbox::util::variant<Database, Exception> Database::tryOpen(const std::string &
     const int error = sqlite3_open_v2(filename.c_str(), &db, flags | SQLITE_OPEN_URI, nullptr);
     if (error != SQLITE_OK) {
         const auto message = sqlite3_errmsg(db);
+        sqlite3_close(db);
         return Exception { error, message };
     }
     return Database(std::make_unique<DatabaseImpl>(db));

test/src/mbgl/test/sqlite3_test_fs.cpp

@@ -278,6 +278,7 @@ SQLite3TestFS::~SQLite3TestFS() {
     sqlite3_vfs* test_fs = sqlite3_vfs_find("test_fs");
     if (test_fs) {
         sqlite3_vfs_unregister(test_fs);
+        sqlite3_free((void*)test_fs);
     }
 }