Use secure https

Change-Id: I2108e916b9e551856a272bd8ccb0496d466ad17d
diff --git a/build/tools/repopick.py b/build/tools/repopick.py
index 521be4b..124e4d3 100644
--- a/build/tools/repopick.py
+++ b/build/tools/repopick.py
@@ -122,7 +122,7 @@
 
 if __name__ == '__main__':
     # Default to BlissRoms Gerrit
-    default_gerrit = 'http://review.blissroms.org'
+    default_gerrit = 'https://review.blissroms.org'
 
     parser = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter, description=textwrap.dedent('''\
         repopick.py is a utility to simplify the process of cherry picking