update export

cmake/export-cpptools.cmake

@@ -7,11 +7,11 @@ install(TARGETS ${CPP_TOOLS_TARGETS}
         )
 install(EXPORT cpp-tools-targets
         FILE cpp-tools-targets.cmake
-        NAMESPACE cpp-tools::
+        NAMESPACE cpp_tools::
         DESTINATION lib/cmake/cpp-tools)
 
 foreach(target ${CPP_TOOLS_TARGETS})
-    install(DIRECTORY ${CPP_TOOLS_ROOT}/${target}/include/cpp-tools/${target}
-            DESTINATION ${CMAKE_INSTALL_PREFIX}/include/cpp-tools/
+    install(DIRECTORY ${CPP_TOOLS_ROOT}/${target}/include/cpp_tools/${target}
+            DESTINATION ${CMAKE_INSTALL_PREFIX}/include/cpp_tools/
     )
 endforeach()