Update golang.org/x/tools commit hash to f4b4e63

Author: renovate-bot

go.mod

@@ -64,7 +64,7 @@ require (
 	github.com/yudai/golcs v0.0.0-20170316035057-ecda9a501e82 // indirect
 	github.com/yudai/pp v2.0.1+incompatible // indirect
 	golang.org/x/oauth2 v0.0.0-20190630083822-0f29369cfe45
-	golang.org/x/tools v0.0.0-20190706074700-72ffa07ba3db
+	golang.org/x/tools v0.0.0-20190712204157-f4b4e6324093
 	gopkg.in/boj/redistore.v1 v1.0.0-20160128113310-fc113767cd6b
 	gopkg.in/redsync.v1 v1.0.1
 	gopkg.in/yaml.v2 v2.2.2

go.sum

@@ -463,6 +463,7 @@ golang.org/x/tools v0.0.0-20190521203540-521d6ed310dd/go.mod h1:RgjU9mgBXZiqYHBn
 golang.org/x/tools v0.0.0-20190630095024-fb37f6ba8261 h1:c+4vBHh8/WzHPKoT09k1Z7njaAGGJRYVUtmq2VW2cUE=
 golang.org/x/tools v0.0.0-20190630095024-fb37f6ba8261/go.mod h1:jcCCGcm9btYwXyDqrUWc6MKQKKGJCWEQ3AfLSRIbEuI=
 golang.org/x/tools v0.0.0-20190706074700-72ffa07ba3db/go.mod h1:jcCCGcm9btYwXyDqrUWc6MKQKKGJCWEQ3AfLSRIbEuI=
+golang.org/x/tools v0.0.0-20190712204157-f4b4e6324093/go.mod h1:jcCCGcm9btYwXyDqrUWc6MKQKKGJCWEQ3AfLSRIbEuI=
 google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0 h1:/wp5JvzpHIxhs/dumFmF7BXTf3Z+dd4uXta4kVyO508=