Convert print statements to Python 3 style

Ran "2to3 -w -n -f print ./" and manually added imports.
Ran "^\s*print " and "\s+print " to find batch/shell scripts, comments and the like with embedded code, and updated them manually.
Also manually added imports to files, which used print as a function, but were missing the import.

The scripts still work with Python 2.
There are no intended behaviour changes.

Bug: 942522
Change-Id: Id777e4d4df4adcdfdab1b18bde89f235ef491b9f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1595684
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@chromium.org>
Auto-Submit: Raul Tambre <raul@tambre.ee>
diff --git a/annotated_gclient.py b/annotated_gclient.py
index 61e0b5d..f985007 100755
--- a/annotated_gclient.py
+++ b/annotated_gclient.py
@@ -12,6 +12,8 @@
       sync --gclientfile=.gclient`
 """
 
+from __future__ import print_function
+
 import contextlib
 import json
 import optparse
@@ -31,7 +33,7 @@
   try:
     os.remove(output_file)
   except OSError as e:
-    print 'Error cleaning up temp file %s: %s' % (output_file, e)
+    print('Error cleaning up temp file %s: %s' % (output_file, e))
 
 
 def parse_got_revision(filename, revision_mapping):
@@ -51,7 +53,7 @@
 
 def emit_buildprops(got_revisions):
   for prop, revision in got_revisions.iteritems():
-    print '@@@SET_BUILD_PROPERTY@%s@%s@@@' % (prop, json.dumps(revision))
+    print('@@@SET_BUILD_PROPERTY@%s@%s@@@' % (prop, json.dumps(revision)))
 
 
 def main():