Merge "Correct return code from main" am: e0185ef337 am: 06ca6016ba am: 3be7c3017a

Original change: https://android-review.googlesource.com/c/platform/external/doclava/+/1524818

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I28a5f01b6f0ea9d90e99808c35f55a0d4af0cf2d
diff --git a/src/com/google/doclava/Doclava.java b/src/com/google/doclava/Doclava.java
index 049e93e..45804a1 100644
--- a/src/com/google/doclava/Doclava.java
+++ b/src/com/google/doclava/Doclava.java
@@ -172,7 +172,7 @@
   }
 
   public static void main(String[] args) {
-    com.sun.tools.javadoc.Main.execute(args);
+    System.exit(com.sun.tools.javadoc.Main.execute(args));
   }
 
   public static boolean start(RootDoc r) {