Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>

When updating from 1.9.41 to 1.9.47, the commit
https://github.com/ros/ros_comm/commit/c5dfa6305e883f76dc2aa52d27d2977e3d66ea2e
adds a routine in the CMakeLists.txt to find the pthread library.
This routine is not suitable for the use with our tool chain, i.e.,
it reports an error (cf. #125) when using roscpp-native.

This commit adds a patch that reverts that change in roscpp's
CMakeLists.txt.

As the license text of the xmlrpcpp changed, the license checksum
is adjusted.

All ROS packages with install tools in the bin directory or install
python code with is used by other packages should be used as native
version. Adapte the DEPENDS accordingly.

Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>