vendor: update vendored packages (go-delve#791)

* pkg/proc: use golang.org/x/arch/x86/x86asm

instead of rsc.io/x86/x86asm

* pkg/dwarf: migrate to github.com/pkg/profile

from github.com/davecheney/profile

* scripts: keep script go files from being considered for the build

scripts/gen-*.go files are scripts for generating documentation
files and don't follow the typical Go package layout. Expected
usage is like

   go run scripts/gen-cli-docs.go

* vendor: update vendored packages

There were many changes in delve, and go tool chains since last
vendored package update. I just rerun godpes from scratch.

$ rm vendor/*
$ rm Godeps/Godeps.json
$ go list ./... | grep -v /vendor/ | grep -v /scripts/ | go get -u -t
$ go get -u github.com/mattn/go-colorable
$ go get -u github.com/mattn/go-isatty
$ go list ./... | grep -v /vendor/ | grep -v /scripts/ | godeps save

pkg/dwarf/frame/parser_test.go

@@ -6,8 +6,8 @@ import (
 	"os"
 	"testing"
 
-	"github.com/davecheney/profile"
 	"github.com/derekparker/delve/pkg/dwarf/frame"
+	"github.com/pkg/profile"
 )
 
 func BenchmarkParse(b *testing.B) {

pkg/dwarf/line/line_parser_test.go

@@ -10,7 +10,7 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/davecheney/profile"
+	"github.com/pkg/profile"
 )
 
 func grabDebugLineSection(p string, t *testing.T) []byte {

pkg/proc/disasm_amd64.go

@@ -4,7 +4,7 @@ import (
 	"debug/gosym"
 	"encoding/binary"
 
-	"rsc.io/x86/x86asm"
+	"golang.org/x/arch/x86/x86asm"
 )
 
 var maxInstructionLength uint64 = 15

pkg/proc/registers_darwin_amd64.go

@@ -5,8 +5,9 @@ import "C"
 import (
 	"encoding/binary"
 	"fmt"
-	"rsc.io/x86/x86asm"
 	"unsafe"
+
+	"golang.org/x/arch/x86/x86asm"
 )
 
 // Regs represents CPU registers on an AMD64 processor.

pkg/proc/registers_linux_amd64.go

@@ -3,8 +3,7 @@ package proc
 import (
 	"fmt"
 
-	"rsc.io/x86/x86asm"
-
+	"golang.org/x/arch/x86/x86asm"
 	sys "golang.org/x/sys/unix"
 )
 

pkg/proc/registers_windows_amd64.go

@@ -2,8 +2,9 @@ package proc
 
 import (
 	"fmt"
-	"rsc.io/x86/x86asm"
 	"unsafe"
+
+	"golang.org/x/arch/x86/x86asm"
 )
 
 // Regs represents CPU registers on an AMD64 processor.

scripts/gen-cli-docs.go

@@ -1,3 +1,5 @@
+// +build ignore
+
 package main
 
 import (

scripts/gen-usage-docs.go

@@ -1,3 +1,5 @@
+// +build ignore
+
 package main
 
 import (