fixup! tests/pkg/flashdb_vfs: improve test output and increase stacksize

Author: MichelRottleuthner

tests/pkg/flashdb_vfs/main.c

@@ -108,7 +108,7 @@ int main(void)
         fdb_kvdb_control(&kvdb, FDB_KVDB_CTRL_SET_FILE_MODE, &file_mode);
         /* create database directory */
         int res = vfs_mkdir(KVDB_DIR, 0777);
-        printf("mkdir '%s' %s", KVDB_DIR, resstr(res == 0 || res == -EEXIST));
+        printf("mkdir '%s' %s\n", KVDB_DIR, resstr(res == 0 || res == -EEXIST));
         if (!(res == 0 || res == -EEXIST)) {
             return -1;
         }
@@ -166,7 +166,7 @@ int main(void)
         fdb_tsdb_control(&tsdb, FDB_TSDB_CTRL_SET_FILE_MODE, &file_mode);
         /* create database directory */
         int res = vfs_mkdir(TSDB_DIR, 0777);
-        printf("mkdir '%s' %s", TSDB_DIR, resstr(res == 0 || res == -EEXIST));
+        printf("mkdir '%s' %s\n", TSDB_DIR, resstr(res == 0 || res == -EEXIST));
 #endif
         /* Time series database initialization
          *