cppunit: new package

CppUnit is the C++ port of the famous JUnit framework for unit testing.
Test output is in XML or text format for automatic testing and GUI
based for supervised tests.

http://www.freedesktop.org/wiki/Software/cppunit/



[Thomas:
  - change license to LGPLv2.1, since there is no indication that the
    "or later" option is used.
  - slightly rewrap text in Config.in file.]

Signed-off-by: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>