golint: group declaration of variables in import.go

Change-Id: I247089a69943c43815460af733268675182fab56
GitHub-Last-Rev: 76a9d79c4fa4757b064a67312d7ff2acd017778f
GitHub-Pull-Request: golang/lint#359
Reviewed-on: https://go-review.googlesource.com/96155
Reviewed-by: Andrew Bonventre <andybons@golang.org>
diff --git a/golint/import.go b/golint/import.go
index 02a0daa..2ba9dea 100644
--- a/golint/import.go
+++ b/golint/import.go
@@ -22,11 +22,10 @@
 	"strings"
 )
 
-var buildContext = build.Default
-
 var (
-	goroot    = filepath.Clean(runtime.GOROOT())
-	gorootSrc = filepath.Join(goroot, "src")
+	buildContext = build.Default
+	goroot       = filepath.Clean(runtime.GOROOT())
+	gorootSrc    = filepath.Join(goroot, "src")
 )
 
 // importPathsNoDotExpansion returns the import paths to use for the given