Reflect new changes in libnabo.

[peci1]

I got build failures with the latest changes in libnabo. This PR fixes them. Requires norlab-ulaval/libnabo#106 if building with catkin tools. The change in Config file is needed by downstream packages, e.g. libpointmatcher_ros.

[YoshuaNava]

Hi @peci1
Sorry for the issue. There is another PR aimed to updating libpointmatcher's cmake (#382), as we did for libnabo. It seems close to merging.

@pomerlef This fix patches libpointmatcher, until the other PR is merged. Two questions:

1. Why is the build failing? (I don't have access to the CI job details)
2. Should we merge this PR before the larger one from @jlblancoc ?

Best,
Yoshua

[pomerlef]

I would directly focus on #382

Error message:

/home/jenkins/workspace/pointmatcher/label/ubuntu-xenial/pointmatcher/MatchersImpl.h:41:23: fatal error: nabo/nabo.h: No such file or directory
compilation terminated.
CMakeFiles/pointmatcher.dir/build.make:158: recipe for target 'CMakeFiles/pointmatcher.dir/pointmatcher/ICP.cpp.o' failed

make[2]: *** [CMakeFiles/pointmatcher.dir/pointmatcher/ICP.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
In file included from /home/jenkins/workspace/pointmatcher/label/ubuntu-xenial/pointmatcher/Registry.cpp:41:0:

/home/jenkins/workspace/pointmatcher/label/ubuntu-xenial/pointmatcher/MatchersImpl.h:41:23: fatal error: nabo/nabo.h: No such file or directory
compilation terminated.
CMakeFiles/pointmatcher.dir/build.make:182: recipe for target 'CMakeFiles/pointmatcher.dir/pointmatcher/Registry.cpp.o' failed

make[2]: *** [CMakeFiles/pointmatcher.dir/pointmatcher/Registry.cpp.o] Error 1
In file included from /home/jenkins/workspace/pointmatcher/label/ubuntu-xenial/contrib/yaml-cpp-pm/include/yaml-cpp-pm/yaml.h:8:0,
                 from /home/jenkins/workspace/pointmatcher/label/ubuntu-xenial/pointmatcher/Registrar.cpp:6:

/home/jenkins/workspace/pointmatcher/label/ubuntu-xenial/contrib/yaml-cpp-pm/include/yaml-cpp-pm/parser.h:46:8: warning: 'template<class> class std::auto_ptr' is deprecated [-Wdeprecated-declarations]
   std::auto_ptr<Scanner> m_pScanner;