[SRC-8327] Adding error messages if ninja and cmake aren't installed (#1736)
[SRC-8327] Adding error messages if ninja and cmake aren't installed (#1736)

* [SRC-8327] Adding error messages if ninja and cmake aren't installed

* Addressing review comments about checkTool function

apple/swift-package-manager,apple/swift-package-manager,apple/swift-package-manager,JGiola/swift-package-manager,abertelrud/swift-package-manager,apple/swift-package-manager,sschiau/swift-package-manager,abertelrud/swift-package-manager,abertelrud/swift-package-manager,sschiau/swift-package-manager,abertelrud/swift-package-manager,abertelrud/swift-package-manager,sschiau/swift-package-manager,apple/swift-package-manager,sschiau/swift-package-manager,JGiola/swift-package-manager,JGiola/swift-package-manager,JGiola/swift-package-manager,sschiau/swift-package-manager,JGiola/swift-package-manager