Nit change to VirtualizedSectionList callback flow type

Summary: This change surprisingly fixes a Flow error because these types weren't compatible with the prop types these were passed into that had `info: `. Flow passes now though!

Reviewed By: lunaleaps

Differential Revision: D17863131

fbshipit-source-id: 094f1d97e96686d16bb69732b8a4b319492b5780

Libraries/Lists/VirtualizedSectionList.js

@@ -75,11 +75,15 @@ type OptionalProps<SectionT: SectionBase<any>> = {
   /**
    * Rendered at the top of each section.
    */
-  renderSectionHeader?: ?({section: SectionT}) => null | React.Element<any>,
+  renderSectionHeader?: ?(info: {
+    section: SectionT,
+  }) => null | React.Element<any>,
   /**
    * Rendered at the bottom of each section.
    */
-  renderSectionFooter?: ?({section: SectionT}) => null | React.Element<any>,
+  renderSectionFooter?: ?(info: {
+    section: SectionT,
+  }) => null | React.Element<any>,
   /**
    * Rendered at the bottom of every Section, except the very last one, in place of the normal
    * ItemSeparatorComponent.