Fix boolean in python script

Change-Id: I5dfed7ff344ffa78705e33b34ee3f966f3881ff5
diff --git a/tools/update_prebuilds_in_android.py b/tools/update_prebuilds_in_android.py
index 7addd5f..49a000c 100755
--- a/tools/update_prebuilds_in_android.py
+++ b/tools/update_prebuilds_in_android.py
@@ -71,10 +71,10 @@
   copy_targets(root, target_root, OTHER_TARGETS, OTHER_TARGETS)
 
 def download_hash(root, commit_hash, target):
-  download_target(root, target, commit_hash, 1)
+  download_target(root, target, commit_hash, True)
 
 def download_version(root, version, target):
-  download_target(root, target, version, 0)
+  download_target(root, target, version, False)
 
 def download_target(root, target, hash_or_version, is_hash):
   download_path = os.path.join(root, target)