Added 'setlocal' and '@echo off' to httpd.cmd
Added 'setlocal' and '@echo off' to httpd.cmd

BUG= http://code.google.com/p/nativeclient/issues/detail?id=1642
TEST=Manually ran httpd.cmd on windows computer and verified its output

Review URL: http://codereview.chromium.org/6882100

git-svn-id: e22621a84199d42b34715cdc089545aeedbbf23f@809 050acbb0-2703-11df-ab0a-9f3f633ae91d

sbc100/nativeclient-sdk,sbc100/nativeclient-sdk,sbc100/nativeclient-sdk,sbc100/nativeclient-sdk,sbc100/nativeclient-sdk,sbc100/nativeclient-sdk,sbc100/nativeclient-sdk