Fix Yoga flexshrink with min-width sizing issue

Summary:
While resolving the flexible items we calculate totalFlexShrinkScaledFactors which uses the flexBasis or initial width of node (Not min-width).

At a later stage during distribution of space we are subtracting value from this which also takes care of min-width.

For example
If node has flexShrink 1 and width 100 and min-width 301  then totalFlexShrinkScaledFactors will become -1*100 = -100
but later we are subtracting -1 * 301 (min-width) = -301 which is ambiguous and causing layout inconsistencies with how web behaves.

Fixed this by only using the flexBasis or width for these calculations.

Changelog:
[Internal][Yoga] Fix layout issue when flexShrink and min-width are used together

Reviewed By: pasqualeanatriello

Differential Revision: D20219419

fbshipit-source-id: 948fbc06ca541d4ad307c88c8a2df65d157778b1

yoga/Yoga.cpp

@@ -2338,7 +2338,8 @@ static void YGDistributeFreeSpaceFirstPass(
           // first and second passes.
           deltaFreeSpace += boundMainSize - childFlexBasis;
           collectedFlexItemsValues.totalFlexShrinkScaledFactors -=
-              flexShrinkScaledFactor;
+              (-currentRelativeChild->resolveFlexShrink() *
+               currentRelativeChild->getLayout().computedFlexBasis.unwrap());
         }
       }
     } else if (