renaming_3: gofix -r go1pkgrename src/pkg/[m-z]*

R=rsc
CC=golang-dev
https://golang.org/cl/5345045

src/pkg/strings/strings.go

@@ -7,7 +7,7 @@ package strings
 
 import (
 	"unicode"
-	"utf8"
+	"unicode/utf8"
 )
 
 // explode splits s into an array of UTF-8 sequences, one per Unicode character (still strings) up to a maximum of n (n < 0 means no limit).