update BUILD files

vendor/github.com/kr/fs/BUILD

@@ -6,6 +6,7 @@ go_library(
         "filesystem.go",
         "walk.go",
     ],
+    importpath = "github.com/kr/fs",
     visibility = ["//visibility:public"],
 )
 

vendor/github.com/kr/pretty/BUILD

@@ -8,6 +8,7 @@ go_library(
         "pretty.go",
         "zero.go",
     ],
+    importpath = "github.com/kr/pretty",
     visibility = ["//visibility:public"],
     deps = ["//vendor/github.com/kr/text:go_default_library"],
 )

vendor/github.com/kr/pty/BUILD

@@ -24,6 +24,7 @@ go_library(
         "//conditions:default": [],
     }),
     cgo = True,
+    importpath = "github.com/kr/pty",
     visibility = ["//visibility:public"],
 )
 

vendor/github.com/kr/text/BUILD

@@ -7,6 +7,7 @@ go_library(
         "indent.go",
         "wrap.go",
     ],
+    importpath = "github.com/kr/text",
     visibility = ["//visibility:public"],
 )