update

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/rcrowley/go-metrics/runtime_gccpufraction.go

@@ -0,0 +1,9 @@
+// +build go1.5
+
+package metrics
+
+import "runtime"
+
+func gcCPUFraction(memStats *runtime.MemStats) float64 {
+	return memStats.GCCPUFraction
+}