Update fluent-logger-golang to v1.2.1

This fixes a regression bug not to connect the destination node twice or more.
That regression was brought by v1.2.0, and it also makes many goroutines for
first reconnection (these will finish after first reconnection established).

Signed-off-by: Satoshi Tagomori <tagomoris@gmail.com>
(cherry picked from commit 53ed17449e990f49e8eecdf71ec3704ce7118660)
Signed-off-by: Victor Vieux <vieux@docker.com>

hack/vendor.sh

@@ -114,7 +114,7 @@ clone git github.com/golang/protobuf 3c84672111d91bb5ac31719e112f9f7126a0e26e
 # gelf logging driver deps
 clone git github.com/Graylog2/go-gelf aab2f594e4585d43468ac57287b0dece9d806883
 
-clone git github.com/fluent/fluent-logger-golang v1.2.0
+clone git github.com/fluent/fluent-logger-golang v1.2.1
 # fluent-logger-golang deps
 clone git github.com/philhofer/fwd 899e4efba8eaa1fea74175308f3fae18ff3319fa
 clone git github.com/tinylib/msgp 75ee40d2601edf122ef667e2a07d600d4c44490c

vendor/src/github.com/fluent/fluent-logger-golang/fluent/fluent.go

@@ -78,7 +78,7 @@ func New(config Config) (f *Fluent, err error) {
 	}
 	if config.AsyncConnect {
 		f = &Fluent{Config: config, reconnecting: true}
-		f.reconnect()
+		go f.reconnect()
 	} else {
 		f = &Fluent{Config: config, reconnecting: false}
 		err = f.connect()
@@ -254,7 +254,7 @@ func (f *Fluent) connect() (err error) {
 		err = net.UnknownNetworkError(f.Config.FluentNetwork)
 	}
 
-	if err != nil {
+	if err == nil {
 		f.reconnecting = false
 	}
 	return

vendor/src/github.com/fluent/fluent-logger-golang/fluent/version.go

@@ -1,3 +1,3 @@
 package fluent
 
-const Version = "1.1.0"
+const Version = "1.2.1"