debug/goobj: move to cmd/internal/goobj

debug/goobj is not ready to be published but it is
needed for the various binary-reading commands.
Move to cmd/internal/goobj.

(The Go 1.3 release branch deleted it, but that's not
an option anymore due to the command dependencies.
The API is still not vetted nor terribly well designed.)

LGTM=adg, dsymonds
R=adg, dsymonds
CC=golang-codereviews
https://golang.org/cl/174250043

src/cmd/internal/objfile/goobj.go

@@ -7,7 +7,7 @@
 package objfile
 
 import (
-	"debug/goobj"
+	"cmd/internal/goobj"
 	"fmt"
 	"os"
 )

src/cmd/link/auto.go

@@ -10,7 +10,7 @@
 package main
 
 import (
-	"debug/goobj"
+	"cmd/internal/goobj"
 	"strconv"
 	"strings"
 )

src/cmd/link/auto_test.go

@@ -13,7 +13,7 @@ package main
 
 import (
 	"bytes"
-	"debug/goobj"
+	"cmd/internal/goobj"
 	"testing"
 )
 

src/cmd/link/dead.go

@@ -6,7 +6,7 @@
 
 package main
 
-import "debug/goobj"
+import "cmd/internal/goobj"
 
 // dead removes unreachable code and data from the program.
 // It is basically a mark-sweep garbage collection: traverse all the

src/cmd/link/dead_test.go

@@ -5,7 +5,7 @@
 package main
 
 import (
-	"debug/goobj"
+	"cmd/internal/goobj"
 	"reflect"
 	"strings"
 	"testing"

src/cmd/link/layout.go

@@ -7,7 +7,7 @@
 package main
 
 import (
-	"debug/goobj"
+	"cmd/internal/goobj"
 )
 
 // A layoutSection describes a single section to add to the

src/cmd/link/link_test.go

@@ -6,7 +6,7 @@ package main
 
 import (
 	"bytes"
-	"debug/goobj"
+	"cmd/internal/goobj"
 	"io/ioutil"
 	"testing"
 )

src/cmd/link/pclntab.go

@@ -7,7 +7,7 @@
 package main
 
 import (
-	"debug/goobj"
+	"cmd/internal/goobj"
 	"encoding/binary"
 	"os"
 	"sort"

src/cmd/link/pclntab_test.go

@@ -6,7 +6,7 @@ package main
 
 import (
 	"bytes"
-	"debug/goobj"
+	"cmd/internal/goobj"
 	"fmt"
 	"math/rand"
 	"sort"

src/cmd/link/prog.go

@@ -5,7 +5,7 @@
 package main
 
 import (
-	"debug/goobj"
+	"cmd/internal/goobj"
 	"encoding/binary"
 	"fmt"
 	"go/build"

src/cmd/link/runtime.go

@@ -7,7 +7,7 @@
 
 package main
 
-import "debug/goobj"
+import "cmd/internal/goobj"
 
 func (p *Prog) runtime() {
 	p.pclntab()

src/cmd/link/scan.go

@@ -11,7 +11,7 @@
 package main
 
 import (
-	"debug/goobj"
+	"cmd/internal/goobj"
 	"os"
 	"sort"
 	"strings"
@@ -69,7 +69,7 @@ func (p *Prog) scanFile(pkgpath string, file string) {
 		return
 	}
 
-	// TODO(rsc): Change debug/goobj to record package name as gp.Name.
+	// TODO(rsc): Change cmd/internal/goobj to record package name as gp.Name.
 	// TODO(rsc): If pkgpath == "main", check that gp.Name == "main".
 
 	pkg.Package = gp