When we replace the PWD key from qmake files and both the base and
current directory are the same, there's no need to add an extra './' to
the current working directory.
This also fixes a unit test in qtsvg as it requires the passed in path
to match exactly to the one outputed in the log files.
Change-Id: Ide9ca6a70493e8039d3af84a9e576d8f6a313f2a
Reviewed-by: Qt CMake Build Bot
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>