CMakeProjectManager: Export CMakeProject

Export CMakeProject to make it possible for plugins
to inspect the BuildTargets of a cmake project.

Change-Id: Ia7eb94689afefee7789e32ec009579856746787a
Reviewed-by: Daniel Teske <daniel.teske@theqtcompany.com>

src/plugins/cmakeprojectmanager/cmakeprojectnodes.h

@@ -34,6 +34,8 @@
 #include <projectexplorer/projectnodes.h>
 
 namespace CMakeProjectManager {
+class CMakeProject;
+
 namespace Internal {
 
 class CMakeProjectNode : public ProjectExplorer::ProjectNode