Expose cmake parser

I would like to use the cmake IOutputParser within my project manager build configuration but it is internal to the the cmake project manager .

https://github.com/qtproject/qt-creator/blob/4.2/src/plugins/cmakeprojectmanager/cmakeparser.h

https://github.com/qtproject/qt-creator/blob/4.2/src/plugins/cmakeprojectmanager/cmakeparser.cpp

https://github.com/ros-industrial/ros_qtc_plugin