[erlang-patches] Fix binary:matches/2,3 when called on empty binary

[Thomas Lachmann]

> Reading only your commit messages (ignoring the information in
> your email), I can't understand why this patch is useful and what
> problem it fixes. Also, it seems it would be better to combine the
> three commits to one.
> 
> Here is our guidelines for writing good commit messages:
> 
> https://github.com/erlang/otp/wiki/Writing-good-commit-messages
> 

Okay, I combined the three patches into one and tried to write a better
commit message.

git fetch git://github.com/thlachmann/otp.git fix_binary_matches

I hope this version is better?

Regards,
Thomas