When invoking the script with "." as the only argument, and there
are multiple .pro files in the current directory, the script would
not choose the correct preferred .pro file (the one that has the
same name as the current directory).
Fix the sorter to handle such a case.
Change-Id: I6df70d7c577649f8854bca9b8879f13bdb1b4d26
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>