Increase logging for device tests.

Many copies or many tests can make it look like the test is locked up.
Log each copy and execution so we can see what's going on.

Change-Id: I50e1f0d8f51dccd8fef8254a9ef09e3f8506e1de
diff --git a/tests/tests.py b/tests/tests.py
index eb84100..4746dcb 100644
--- a/tests/tests.py
+++ b/tests/tests.py
@@ -359,6 +359,7 @@
         # This was the case with the old shell based script too. I'm trying not
         # to change too much in the translation.
         lib_path = os.path.join(abi_dir, test_file)
+        print('Pushing {} to {}'.format(lib_path, device_dir))
         adb.push(lib_path, device_dir)
 
         # TODO(danalbert): Sync data.
@@ -414,6 +415,7 @@
 
                 cmd = 'cd {} && LD_LIBRARY_PATH={} ./{}'.format(
                     device_dir, device_dir, case)
+                print('Executing test: {}'.format(cmd))
                 result, out = adb.shell(cmd)
                 if result == 0:
                     results.append(Success(case_name))