Git: Un-ignore locale directory (#1512)

The whole locale dir was ignored since 4c874e8110df823ed575fec7172a0817a6e5a7db.
Most of the dir is source code, so ignoring just the scriptstrings subdir.

The locale dir is now checked by Black and e9dfbc4eee6fa14af2f0a8a5e1a7c723b34254db (#1513) applied Black there.

.gitignore

@@ -3,7 +3,7 @@
 *.lock
 *.pyc
 OBJ.*
-locale/*
+locale/scriptstrings/*
 bin.*/*
 dist.*/*
 config.log