fix(deps): update sigs.k8s.io/cluster-api/hack/tools commit hash to abb337e

Author: whitesource-for-github-com[bot]

hack/tools/go.mod

@@ -5,7 +5,7 @@ go 1.13
 require (
 	github.com/a8m/envsubst v1.1.0
 	github.com/golangci/golangci-lint v1.23.8
-	sigs.k8s.io/cluster-api/hack/tools v0.0.0-20200311152736-bfcc6f37fe12
+	sigs.k8s.io/cluster-api/hack/tools abb337e10b68
 	sigs.k8s.io/controller-tools v0.2.6
 	sigs.k8s.io/kustomize/kustomize/v3 v3.5.4
 	sigs.k8s.io/testing_frameworks v0.1.2