Fix ktlint formatting. am: bfc4cbe959 am: a2f8726ba9 am: 56efda64d7

Original change: https://android-review.googlesource.com/c/platform/prebuilts/ktlint/+/2039263

Change-Id: I19b3e07f40b439b1fc05e691d0fe83c59ba92b79
diff --git a/ktlint.py b/ktlint.py
index 008721d..16bc0f8 100755
--- a/ktlint.py
+++ b/ktlint.py
@@ -60,7 +60,7 @@
     stdout, _ = check.communicate()
     if stdout:
       print('prebuilts/ktlint found errors in files you changed:')
-      print(stdout)
+      print(stdout.decode('utf-8'))
       print(FORMAT_MESSAGE.format(MAIN_DIRECTORY, ' '.join(kt_files)))
       sys.exit(1)
     else: