build: apply gofmt from golang 1.17

bin/check-merged.go

@@ -1,3 +1,4 @@
+//go:build ignore
 // +build ignore
 
 // Attempt to work out if branches have already been merged

bin/cross-compile.go

@@ -1,3 +1,4 @@
+//go:build ignore
 // +build ignore
 
 // Cross compile rclone - in go because I hate bash ;-)

bin/get-github-release.go

@@ -1,3 +1,4 @@
+//go:build ignore
 // +build ignore
 
 // Get the latest release from a github project

bin/test_independence.go

@@ -1,3 +1,4 @@
+//go:build ignore
 // +build ignore
 
 // Test that the tests in the suite passed in are independent