fix docker build annotations (#917)

readline/term_bsd.go

@@ -1,4 +1,4 @@
-// go build darwin dragonfly freebsd netbsd openbsd
+//go:build darwin || freebsd || netbsd || openbsd
 package readline
 
 import (

readline/term_linux.go

@@ -1,3 +1,4 @@
+//go:build linux || solaris
 package readline
 
 import (