vendor: update vendored lif

Updates golang_org/x/net/lif to rev fcc8ed8 for:
- lif: rename internal types (http://golang.org/cl/43070)

Change-Id: I0aad9a8b504d673b29d3c26b3717ffa8512e0cdf
Reviewed-on: https://go-review.googlesource.com/44392Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/vendor/golang_org/x/net/lif/defs_solaris.go

@@ -75,7 +75,7 @@ const (
 	sizeofLifIfinfoReq = C.sizeof_struct_lif_ifinfo_req
 )
 
-type sysLifnum C.struct_lifnum
+type lifnum C.struct_lifnum
 
 type lifreq C.struct_lifreq
 

src/vendor/golang_org/x/net/lif/link.go

@@ -70,7 +70,7 @@ func Links(af int, name string) ([]Link, error) {
 
 func links(eps []endpoint, name string) ([]Link, error) {
 	var lls []Link
-	lifn := sysLifnum{Flags: sysLIFC_NOXMIT | sysLIFC_TEMPORARY | sysLIFC_ALLZONES | sysLIFC_UNDER_IPMP}
+	lifn := lifnum{Flags: sysLIFC_NOXMIT | sysLIFC_TEMPORARY | sysLIFC_ALLZONES | sysLIFC_UNDER_IPMP}
 	lifc := lifconf{Flags: sysLIFC_NOXMIT | sysLIFC_TEMPORARY | sysLIFC_ALLZONES | sysLIFC_UNDER_IPMP}
 	for _, ep := range eps {
 		lifn.Family = uint16(ep.af)

src/vendor/golang_org/x/net/lif/zsys_solaris_amd64.go

@@ -65,7 +65,7 @@ const (
 	sizeofLifIfinfoReq = 0x10
 )
 
-type sysLifnum struct {
+type lifnum struct {
 	Family    uint16
 	Pad_cgo_0 [2]byte
 	Flags     int32