[LyX/master] Correct commit 92b0886: true is not True in python.

[Stephan Witt]

commit 65a95620b219eb108c5013a9e37c22218534b411
Author: Stephan Witt <sw...@lyx.org>
Date:   Tue Sep 15 07:18:16 2015 +0200

    Correct commit 92b0886: true is not True in python.

diff --git a/lib/configure.py b/lib/configure.py
index db947b8..0096a91 100644
--- a/lib/configure.py
+++ b/lib/configure.py
@@ -166,7 +166,7 @@ def checkUpgrade():
             logger.debug('previous = ' + previous)
             if os.path.isdir( previous ):
                 logger.info('Found directory "%s".', previous)
-                copy_tree( previous, cwd, true )
+                copy_tree( previous, cwd, True )
                 logger.info('Content copied to directory "%s".', cwd)
                 return