Wrong name for the Build<package>.cmake for matio-cpp

[Nicogene]

The cmake name of matio-cpp is actually matioCpp, then this https://github.com/robotology/robotology-superbuild/blob/master/cmake/Buildmatio-cpp.cmake should be named BuildmatioCpp.cmake and matio-cpp has to be replaced in other find_or_build_package calls.

cc @traversaro @S-Dafarra

[S-Dafarra]

Is it ok to have the two names different?

[traversaro]

Good point!

[traversaro]

Is it ok to have the two names different?

In the normal workflow that we typically use is not a big difference, having two different names may be problematic if you want to configure the superbuild to use an external matioCpp as find_or_build_package(matio-cpp) will not actually look for the matioCpp package.