cmd/5g etc: tweak import blocks

Remove blank lines and merge lone imports into blocks.

Change-Id: Ib46dad584456909969f1ba3a2c7f5667abf336ae
Reviewed-on: https://go-review.googlesource.com/6792
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/src/cmd/9g/cgen.go b/src/cmd/9g/cgen.go
index 424825b..4ab5215 100644
--- a/src/cmd/9g/cgen.go
+++ b/src/cmd/9g/cgen.go
@@ -5,11 +5,11 @@
 package main
 
 import (
+	"cmd/internal/gc"
 	"cmd/internal/obj"
 	"cmd/internal/obj/ppc64"
 	"fmt"
 )
-import "cmd/internal/gc"
 
 /*
  * peep.c
diff --git a/src/cmd/9g/galign.go b/src/cmd/9g/galign.go
index 99425c3..b39149a 100644
--- a/src/cmd/9g/galign.go
+++ b/src/cmd/9g/galign.go
@@ -5,10 +5,10 @@
 package main
 
 import (
+	"cmd/internal/gc"
 	"cmd/internal/obj"
 	"cmd/internal/obj/ppc64"
 )
-import "cmd/internal/gc"
 
 var thechar int = '9'
 
diff --git a/src/cmd/9g/ggen.go b/src/cmd/9g/ggen.go
index d9bcfb7..3cca4a5 100644
--- a/src/cmd/9g/ggen.go
+++ b/src/cmd/9g/ggen.go
@@ -5,11 +5,11 @@
 package main
 
 import (
+	"cmd/internal/gc"
 	"cmd/internal/obj"
 	"cmd/internal/obj/ppc64"
 	"fmt"
 )
-import "cmd/internal/gc"
 
 func defframe(ptxt *obj.Prog) {
 	var n *gc.Node
diff --git a/src/cmd/9g/gsubr.go b/src/cmd/9g/gsubr.go
index 1f1a43e..5db301a 100644
--- a/src/cmd/9g/gsubr.go
+++ b/src/cmd/9g/gsubr.go
@@ -31,11 +31,11 @@
 package main
 
 import (
+	"cmd/internal/gc"
 	"cmd/internal/obj"
 	"cmd/internal/obj/ppc64"
 	"fmt"
 )
-import "cmd/internal/gc"
 
 // TODO(rsc): Can make this bigger if we move
 // the text segment up higher in 6l for all GOOS.
diff --git a/src/cmd/9g/peep.go b/src/cmd/9g/peep.go
index 03581b1..af2e68c 100644
--- a/src/cmd/9g/peep.go
+++ b/src/cmd/9g/peep.go
@@ -31,11 +31,11 @@
 package main
 
 import (
+	"cmd/internal/gc"
 	"cmd/internal/obj"
 	"cmd/internal/obj/ppc64"
 	"fmt"
 )
-import "cmd/internal/gc"
 
 var gactive uint32
 
diff --git a/src/cmd/9g/prog.go b/src/cmd/9g/prog.go
index 24de65f..d5d5346 100644
--- a/src/cmd/9g/prog.go
+++ b/src/cmd/9g/prog.go
@@ -5,10 +5,10 @@
 package main
 
 import (
+	"cmd/internal/gc"
 	"cmd/internal/obj"
 	"cmd/internal/obj/ppc64"
 )
-import "cmd/internal/gc"
 
 const (
 	LeftRdwr  uint32 = gc.LeftRead | gc.LeftWrite