all: update build constraints to Go 1.17

Do it all at once in preparation for Go 1.18 support.

To make this commit, I've simply modified the `fmt-check` Makefile
target to rewrite files instead of listing the differences. So this is a
fully mechanical change, it should not have introduced any errors.

src/os/dir.go

@@ -1,3 +1,4 @@
+//go:build go1.16
 // +build go1.16
 
 // Copyright 2016 The Go Authors. All rights reserved.

src/os/dir_other.go

@@ -1,3 +1,4 @@
+//go:build (go1.16 && baremetal) || (go1.16 && js) || (go1.16 && wasi) || (go1.16 && windows)
 // +build go1.16,baremetal go1.16,js go1.16,wasi go1.16,windows
 
 // Copyright 2009 The Go Authors. All rights reserved.

src/os/dir_other_go115.go

@@ -1,3 +1,4 @@
+//go:build !go1.16
 // +build !go1.16
 
 // Copyright 2009 The Go Authors. All rights reserved.

src/os/dir_test.go

@@ -1,3 +1,4 @@
+//go:build darwin || (linux && !baremetal && !js && !wasi && !386 && !arm)
 // +build darwin linux,!baremetal,!js,!wasi,!386,!arm
 
 package os_test

src/os/dir_unix.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux && !baremetal && !wasi
 // +build linux,!baremetal,!wasi
 
 package os

src/os/dirent_linux.go

@@ -1,3 +1,4 @@
+//go:build !baremetal && !js && !wasi
 // +build !baremetal,!js,!wasi
 
 // Copyright 2020 The Go Authors. All rights reserved.

src/os/env_unix_test.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//+build darwin linux
+//go:build darwin || linux
+// +build darwin linux
 
 package os_test
 

src/os/executable_other.go

@@ -1,3 +1,4 @@
+//go:build !linux || baremetal
 // +build !linux baremetal
 
 package os

src/os/executable_procfs.go

@@ -4,6 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux && !baremetal
 // +build linux,!baremetal
 
 package os

src/os/file_anyos_test.go

@@ -1,3 +1,4 @@
+//go:build !baremetal && !js
 // +build !baremetal,!js
 
 package os_test

src/os/file_go_116.go

@@ -1,3 +1,4 @@
+//go:build go1.16
 // +build go1.16
 
 package os

src/os/file_go_116_test.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.16 && !baremetal && !js && !wasi
 // +build go1.16,!baremetal,!js,!wasi
 
 // DirFS tests copied verbatim from upstream os_test.go, and adjusted minimally to fit tinygo.

src/os/file_other.go

@@ -1,3 +1,4 @@
+//go:build baremetal || (wasm && !wasi)
 // +build baremetal wasm,!wasi
 
 package os

src/os/file_unix.go

@@ -1,3 +1,4 @@
+//go:build darwin || (linux && !baremetal)
 // +build darwin linux,!baremetal
 
 // Portions copyright 2009 The Go Authors. All rights reserved.

src/os/os_anyos_test.go

@@ -1,3 +1,4 @@
+//go:build windows || darwin || (linux && !baremetal)
 // +build windows darwin linux,!baremetal
 
 package os_test

src/os/os_chmod_test.go

@@ -1,3 +1,4 @@
+//go:build !baremetal && !js && !wasi
 // +build !baremetal,!js,!wasi
 
 // Copyright 2009 The Go Authors. All rights reserved.

src/os/os_symlink_test.go

@@ -1,3 +1,4 @@
+//go:build !windows && !baremetal && !js && !wasi
 // +build !windows,!baremetal,!js,!wasi
 
 // Copyright 2009 The Go Authors. All rights reserved.

src/os/path.go

@@ -1,3 +1,4 @@
+//go:build !baremetal && !js
 // +build !baremetal,!js
 
 // Copyright 2009 The Go Authors. All rights reserved.

src/os/seek_unix_bad.go

@@ -1,3 +1,4 @@
+//go:build (linux && !baremetal && 386) || (linux && !baremetal && arm && !wasi)
 // +build linux,!baremetal,386 linux,!baremetal,arm,!wasi
 
 package os

src/os/stat_linux.go

@@ -1,3 +1,4 @@
+//go:build linux && !baremetal
 // +build linux,!baremetal
 
 // Copyright 2009 The Go Authors. All rights reserved.

src/os/stat_other.go

@@ -1,4 +1,5 @@
-//  +build baremetal wasm,!wasi
+//go:build baremetal || (wasm && !wasi)
+// +build baremetal wasm,!wasi
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/os/stat_unix.go

@@ -1,3 +1,4 @@
+//go:build darwin || (linux && !baremetal)
 // +build darwin linux,!baremetal
 
 // Copyright 2016 The Go Authors. All rights reserved.

src/os/types_anyos.go

@@ -1,3 +1,4 @@
+//go:build !baremetal && !js
 // +build !baremetal,!js
 
 // Copyright 2009 The Go Authors. All rights reserved.

src/os/types_unix.go

@@ -1,3 +1,4 @@
+//go:build darwin || (linux && !baremetal)
 // +build darwin linux,!baremetal
 
 // Copyright 2009 The Go Authors. All rights reserved.