Fix an example in PercentRelativeLayout documentation.

Bug:
https://code.google.com/p/android/issues/detail?id=205716

Change-Id: I5b806bf97aae137132d7c6192fad96f2078cf892
diff --git a/percent/src/android/support/percent/PercentRelativeLayout.java b/percent/src/android/support/percent/PercentRelativeLayout.java
index 1c00c4b..f068d6b 100644
--- a/percent/src/android/support/percent/PercentRelativeLayout.java
+++ b/percent/src/android/support/percent/PercentRelativeLayout.java
@@ -40,7 +40,7 @@
  *         app:layout_heightPercent="50%"
  *         app:layout_marginTopPercent="25%"
  *         app:layout_marginLeftPercent="25%"/&gt
- * </android.support.percent.PercentFrameLayout&gt
+ * </android.support.percent.PercentRelativeLayout&gt
  * </pre>
  *
  * The attributes that you can use are: