a variation of some letters is not added

[bely66]

I found that a variation of the letters ل and م isn't added for amiri fonts
I don't know what would be the complexity or time taken to add them but I'm willing to contribute.
Attached is some pictures of the issue I'm faceing

Original Font:
حرف اللم على الصاد

حرف الميم بعد الالف واللام

Drawing using PIL and arabic-reshaper:

There're some other examples, but I wanted to know you initial response

[mpcabd]

Unfortunately I'm aware of this, it's a duplicate of #52.