Update golang.org/x/tools commit hash to 3ac2a5b

Author: renovate-bot

go.mod

@@ -14,7 +14,7 @@ require (
 	golang.org/x/crypto v0.0.0-20190923035154-9ee001bba392 // indirect
 	golang.org/x/net v0.0.0-20190923162816-aa69164e4478 // indirect
 	golang.org/x/text v0.3.2 // indirect
-	golang.org/x/tools v0.0.0-20190923230126-0f9bb8f614ff
+	golang.org/x/tools v0.0.0-20190924052046-3ac2a5bbd98a
 	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 	gopkg.in/yaml.v2 v2.2.2
 )

go.sum

@@ -101,6 +101,8 @@ golang.org/x/tools v0.0.0-20190920225731-5eefd052ad72 h1:bw9doJza/SFBEweII/rHQh3
 golang.org/x/tools v0.0.0-20190920225731-5eefd052ad72/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190923230126-0f9bb8f614ff h1:palXc2/lH3aFG86BII2o6pUYgrcAjON5FyYk7zthL3Q=
 golang.org/x/tools v0.0.0-20190923230126-0f9bb8f614ff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20190924052046-3ac2a5bbd98a h1:DJzZ1GRmbjp7ihxzAN6UTVpVMi6k4CXZEr7A3wi2kRA=
+golang.org/x/tools v0.0.0-20190924052046-3ac2a5bbd98a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=