Fix reorder-init-list warning in RCTViewComponentView

Summary:
Changes the order of `RCTBorderColors` field designators to match their declaration order, fixing one case of `-Wreorder-init-list` when compiling the RN codebase with Xcode 12.

Changelog: [Internal]

Reviewed By: MichaReiser

Differential Revision: D23447685

fbshipit-source-id: f04a3841187f0869d2efb60e81ce075c45f27f3c

React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm

@@ -340,8 +340,8 @@ static RCTCornerRadii RCTCornerRadiiFromBorderRadii(BorderRadii borderRadii)
 
 static RCTBorderColors RCTBorderColorsFromBorderColors(BorderColors borderColors)
 {
-  return RCTBorderColors{.left = RCTCGColorRefUnretainedFromSharedColor(borderColors.left),
-                         .top = RCTCGColorRefUnretainedFromSharedColor(borderColors.top),
+  return RCTBorderColors{.top = RCTCGColorRefUnretainedFromSharedColor(borderColors.top),
+                         .left = RCTCGColorRefUnretainedFromSharedColor(borderColors.left),
                          .bottom = RCTCGColorRefUnretainedFromSharedColor(borderColors.bottom),
                          .right = RCTCGColorRefUnretainedFromSharedColor(borderColors.right)};
 }