Fix vogar when OUT_DIR is not set

Commit 128163bc broke it. Commit af11af97e was a follow up
to fix host but did not fix it for target.

Change-Id: Ibd206117a42628d52a137d12c94527f1e9e5dcb0
diff --git a/src/vogar/android/AndroidSdk.java b/src/vogar/android/AndroidSdk.java
index e2c8c93..fc1b482 100644
--- a/src/vogar/android/AndroidSdk.java
+++ b/src/vogar/android/AndroidSdk.java
@@ -124,7 +124,7 @@
 
             String outDir = System.getenv("OUT_DIR");
             if (outDir == null || outDir.length() == 0) {
-              outDir = "./out";
+              outDir = "./out/";
             } else {
               outDir += "/";
             }