title: Dynamic height for a horizontal UIStackview
body: <p>I have a horizontal StackView with distribution as "fill equally". It has 3 labels.
  I want one of the labels to have dynamic height. 
  When I set the number of number of lines to 0 for that label, it ends up breaking the constraint the spacing constraint at runtime.</p>
  
  <p>All these horizontal stackviews make a one vertical stackview. 
  I have tried setting lower vertical hugging priority and higher resistance priority to the multiline label</p>
  
  <p>Also it behaves like this in the XIB</p>
  
  <p>Before changing the number of lines
   <a href="https://i.stack.imgur.com/Sswou.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Sswou.png" alt="enter image description here"></a></p>
  
  <p>After changing the number of lines
  <a href="https://i.stack.imgur.com/lSeHp.png" rel="noreferrer"><img src="https://i.stack.imgur.com/lSeHp.png" alt="enter image description here"></a></p>