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/syscall/errno_other.go

@@ -1,3 +1,4 @@
+//go:build !wasi && !darwin
 // +build !wasi,!darwin
 
 package syscall

src/syscall/file_emulated.go

@@ -1,3 +1,4 @@
+//go:build baremetal || wasm
 // +build baremetal wasm
 
 // This file emulates some file-related functions that are only available

src/syscall/file_hosted.go

@@ -1,3 +1,4 @@
+//go:build !baremetal && !wasm
 // +build !baremetal,!wasm
 
 // This file assumes there is a libc available that runs on a real operating

src/syscall/proc_emulated.go

@@ -1,3 +1,4 @@
+//go:build baremetal || wasi || wasm
 // +build baremetal wasi wasm
 
 // This file emulates some process-related functions that are only available

src/syscall/proc_hosted.go

@@ -1,3 +1,4 @@
+//go:build !baremetal && !wasi && !wasm
 // +build !baremetal,!wasi,!wasm
 
 // This file assumes there is a libc available that runs on a real operating

src/syscall/syscall_libc.go

@@ -1,3 +1,4 @@
+//go:build darwin || nintendoswitch || wasi
 // +build darwin nintendoswitch wasi
 
 package syscall

src/syscall/syscall_libc_darwin.go

@@ -1,3 +1,4 @@
+//go:build darwin
 // +build darwin
 
 package syscall

src/syscall/syscall_libc_nintendoswitch.go

@@ -1,3 +1,4 @@
+//go:build nintendoswitch
 // +build nintendoswitch
 
 package syscall

src/syscall/syscall_libc_wasi.go

@@ -1,3 +1,4 @@
+//go:build wasi
 // +build wasi
 
 package syscall

src/syscall/syscall_nonhosted.go

@@ -1,3 +1,4 @@
+//go:build baremetal || js
 // +build baremetal js
 
 package syscall

src/syscall/tables_nonhosted.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 baremetal || nintendoswitch || js
 // +build baremetal nintendoswitch js
 
 package syscall