Update vendor

vendor/github.com/cloudfoundry/gosigar/sigar_util.go

@@ -0,0 +1,22 @@
+// Copyright (c) 2012 VMware, Inc.
+
+package sigar
+
+import (
+	"unsafe"
+)
+
+func bytePtrToString(ptr *int8) string {
+	bytes := (*[10000]byte)(unsafe.Pointer(ptr))
+
+	n := 0
+	for bytes[n] != 0 {
+		n++
+	}
+
+	return string(bytes[0:n])
+}
+
+func chop(buf []byte) []byte {
+	return buf[0 : len(buf)-1]
+}