[Android] Fix tombstone output when handling multiple tombstones.

build/android/tombstones.py

Index: build/android/tombstones.py
diff --git a/build/android/tombstones.py b/build/android/tombstones.py
index c83a584800fc70042e4e1d7d8f7faf22e9cdeb86..dbfe3f76c2887270eeeb90fd02ea31fead5b574c 100755
--- a/build/android/tombstones.py
+++ b/build/android/tombstones.py
@@ -157,12 +157,13 @@ def _ResolveTombstones(jobs, tombstones):
     logging.warning('No tombstones to resolve.')
     return
   if len(tombstones) == 1:
-    data = _ResolveTombstone(tombstones[0])
+    data = [_ResolveTombstone(tombstones[0])]
   else:
     pool = multiprocessing.Pool(processes=jobs)
     data = pool.map(_ResolveTombstone, tombstones)
-  for d in data:
-    logging.info(d)
+  for tombstone in data:
+    for line in tombstone:
+      logging.info(line)
 
 
 def _GetTombstonesForDevice(device, options):