code review 5795067: doc/progs: skip cgo1 and cgo2 on freebsd

doc/progs/run

 #!/usr/bin/env bash
 # Copyright 2009 The Go Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
 set -e
 
-goarch=$(go env GOARCH)
+goos=$(go env GOOS)
 
 defer_panic_recover="
         defer
         defer2
 "
 
 effective_go="
         eff_bytesize
         eff_qr
         eff_sequence
@@ skipping 11 matching lines @@
         interface2
 "
 
 c_go_cgo="
         cgo1
         cgo2
         cgo3
         cgo4
 "
 # cgo1 and cgo2 don't run on freebsd, srandom has a different signature
-if [[ $goarch != "freebsd" ]]; then
+if [ "$goos" == "freebsd" ]; then
         c_go_cgo="cgo3 cgo4"
 fi
 
 all=$(echo $defer_panic_recover $effective_go $error_handling $law_of_reflection $c_go_cgo slices go1)
 
 for i in $all; do
         go build $i.go
 done
 
 # Write to temporary file to avoid mingw bash bug.
@@ skipping 13 matching lines @@
 testit defer2 '^Calling g. Printing in g 0 Printing in g 1 Printing in g 2 Printing in g 3 Panicking! Defer in g 3 Defer in g 2 Defer in g 1 Defer in g 0 Recovered in f 4 Returned normally from f.$'
 
 testit eff_bytesize '^1.00YB 9.09TB$'
 testit eff_sequence '^\[-1 2 6 16 44\]$'
 
 testit go1 '^Christmas is a holiday: true Sleeping for 0.123s.*go1.go already exists$'
 
 testit interface2 "^type: float64$"
 
 rm -f $all "$TMPFILE"