py3: update all the things

Change-Id: I5e11b46b7c2f7f8760d6c0e713ca99c1e88b7cd3
diff --git a/tools/adbs b/tools/adbs
index a8f06c0..9bd5160 100755
--- a/tools/adbs
+++ b/tools/adbs
@@ -14,6 +14,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import os
 import os.path
 import re