[React Native] Support variable corner radii on RCTView

Examples/UIExplorer/BorderExample.js

@@ -68,6 +68,18 @@ var styles = StyleSheet.create({
     borderLeftWidth: 40,
     borderLeftColor: 'blue',
   },
+  border6: {
+    borderTopWidth: 10,
+    borderTopColor: 'red',
+    borderRightWidth: 20,
+    borderRightColor: 'yellow',
+    borderBottomWidth: 30,
+    borderBottomColor: 'green',
+    borderLeftWidth: 40,
+    borderLeftColor: 'blue',
+
+    borderTopLeftRadius: 100,
+  },
 });
 
 exports.title = 'Border';
@@ -115,4 +127,11 @@ exports.examples = [
       return <View style={[styles.box, styles.border5]} />;
     }
   },
+  {
+    title: 'Custom Borders',
+    description: 'border*Width & border*Color',
+    render() {
+      return <View style={[styles.box, styles.border6]} />;
+    }
+  },
 ];

Examples/UIExplorer/UIExplorerBlock.js

@@ -69,9 +69,10 @@ var styles = StyleSheet.create({
     overflow: 'hidden',
   },
   titleContainer: {
-    borderWidth: 0.5,
-    borderRadius: 2.5,
-    borderColor: '#d6d7da',
+    borderBottomWidth: 0.5,
+    borderTopLeftRadius: 3,
+    borderTopRightRadius: 2.5,
+    borderBottomColor: '#d6d7da',
     backgroundColor: '#f6f7f8',
     paddingHorizontal: 10,
     paddingVertical: 5,