unix: don't export padding fields on Solaris

Re-run ./mkall.sh to avoid exporting Pad_cgo* fields on solaris/amd64.
Akin to CL 89495.

Updates golang/go#18632

Change-Id: Ib80bf6376d0b7c0a5efd0f5d4a0f27e8e37d8abe
Reviewed-on: https://go-review.googlesource.com/100556
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

unix/ztypes_solaris_amd64.go

@@ -105,7 +105,7 @@ type Stat_t struct {
 	Mtim    Timespec
 	Ctim    Timespec
 	Blksize int32
-	Pad_cgo_0 [4]byte
+	_       [4]byte
 	Blocks  int64
 	Fstype  [16]int8
 }
@@ -113,7 +113,7 @@ type Stat_t struct {
 type Flock_t struct {
 	Type   int16
 	Whence int16
-	Pad_cgo_0 [4]byte
+	_      [4]byte
 	Start  int64
 	Len    int64
 	Sysid  int32
@@ -126,7 +126,7 @@ type Dirent struct {
 	Off    int64
 	Reclen uint16
 	Name   [1]int8
-	Pad_cgo_0 [5]byte
+	_      [5]byte
 }
 
 type _Fsblkcnt_t uint64
@@ -213,13 +213,13 @@ type IPv6Mreq struct {
 type Msghdr struct {
 	Name         *byte
 	Namelen      uint32
-	Pad_cgo_0    [4]byte
+	_            [4]byte
 	Iov          *Iovec
 	Iovlen       int32
-	Pad_cgo_1    [4]byte
+	_            [4]byte
 	Accrights    *int8
 	Accrightslen int32
-	Pad_cgo_2    [4]byte
+	_            [4]byte
 }
 
 type Cmsghdr struct {
@@ -275,7 +275,7 @@ type Ustat_t struct {
 	Tinode uint64
 	Fname  [6]int8
 	Fpack  [6]int8
-	Pad_cgo_0 [4]byte
+	_      [4]byte
 }
 
 const (
@@ -301,7 +301,7 @@ type IfMsghdr struct {
 	Addrs   int32
 	Flags   int32
 	Index   uint16
-	Pad_cgo_0 [2]byte
+	_       [2]byte
 	Data    IfData
 }
 
@@ -309,7 +309,7 @@ type IfData struct {
 	Type       uint8
 	Addrlen    uint8
 	Hdrlen     uint8
-	Pad_cgo_0  [1]byte
+	_          [1]byte
 	Mtu        uint32
 	Metric     uint32
 	Baudrate   uint32
@@ -334,7 +334,7 @@ type IfaMsghdr struct {
 	Addrs   int32
 	Flags   int32
 	Index   uint16
-	Pad_cgo_0 [2]byte
+	_       [2]byte
 	Metric  int32
 }
 
@@ -343,7 +343,7 @@ type RtMsghdr struct {
 	Version uint8
 	Type    uint8
 	Index   uint16
-	Pad_cgo_0 [2]byte
+	_       [2]byte
 	Flags   int32
 	Addrs   int32
 	Pid     int32
@@ -389,7 +389,7 @@ type BpfStat struct {
 
 type BpfProgram struct {
 	Len   uint32
-	Pad_cgo_0 [4]byte
+	_     [4]byte
 	Insns *BpfInsn
 }
 
@@ -410,7 +410,7 @@ type BpfHdr struct {
 	Caplen  uint32
 	Datalen uint32
 	Hdrlen  uint16
-	Pad_cgo_0 [2]byte
+	_       [2]byte
 }
 
 type Termios struct {
@@ -419,7 +419,7 @@ type Termios struct {
 	Cflag uint32
 	Lflag uint32
 	Cc    [19]uint8
-	Pad_cgo_0 [1]byte
+	_     [1]byte
 }
 
 type Termio struct {
@@ -429,7 +429,7 @@ type Termio struct {
 	Lflag uint16
 	Line  int8
 	Cc    [8]uint8
-	Pad_cgo_0 [1]byte
+	_     [1]byte
 }
 
 type Winsize struct {