This patch adds support for binding a specific CMakeTool to a Kit.
When creating a new Kit or loading a existing one without a valid
CMakeTool, the default CMakeTool will be set.
Change-Id: I28d0843a01c583c4b31fc680a0ec556b40cd9c0d
Reviewed-by: Daniel Teske <daniel.teske@theqtcompany.com>
