Update bash_completion to not use a temp file

bash_completion

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Add programmable completion to some Chromium OS build scripts
 
 
 # Echo a list of -- flags that the current command accepts. The
 # function assumes that the command supports shflags' --help flag.
 _flags() {
@@ skipping 182 matching lines @@
   "$repo" help --all | grep -E '^  ' | sed 's/  \([^ ]\+\) .\+/\1/'
 }
 
 _list_repo_branches() {
   local repo=${COMP_WORDS[0]}
   "$repo" branches 2>&1 | grep \| | sed 's/[ *][Pp ] *\([^ ]\+\) .*/\1/'
 }
 
 _list_repo_projects() {
   local repo=${COMP_WORDS[0]}
-  local manifest=$(mktemp)
-  "$repo" manifest -o "$manifest" >& /dev/null
-  grep 'project name=' "$manifest" | sed 's/.\+name="\([^"]\+\)".\+/\1/'
-  rm -f "$manifest" >& /dev/null
+  "$repo" manifest -o /dev/stdout 2> /dev/null \
+    | grep 'project name=' \
+    | sed 's/.\+name="\([^"]\+\)".\+/\1/'
 }
 
 # Complete repo's <command> argument.
 _complete_repo_command() {
   [ ${COMP_CWORD} -eq 1 ] || return 1
   local command=${COMP_WORDS[1]}
   COMPREPLY=($(compgen -W "$(_list_repo_commands)" -- "$command"))
   return 0
 }
 
@@ skipping 37 matching lines @@
   image_to_usb.sh \
   mod_image_for_test.sh
 complete -o bashdefault -o default -F _board_overlay setup_board
 complete -o bashdefault -o default -o nospace -F _autotest_complete autotest
 complete -F _cros_workon cros_workon
 complete -F _complete_repo repo
 
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