log4cplus: Fix LIC_FILES_CHKSUM

* was probably broken since it was added in:
  commit a506a9ef


  Author: Maxin B. John <maxin.john@enea.com>
  Date:   Tue Aug 27 07:55:14 2013 +0000
  Subject: log4cplus: add recipe

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>