NSLayoutConstraint+MASDebugAdditions: Remove duplicate key in dictionary.
NSLayoutConstraint+MASDebugAdditions: Remove duplicate key in dictionary.

The value of `NSLayoutAttributeBaseline` is equal to
`NSLayoutAttributeLastBaseline` in the enum definition, so when putting
both of them in a dictionary result in twice the same key.

Lightricks/Masonry,Lightricks/Masonry