Advertise the new "driver-install-translator" mode as part of the standard  help text. This is to emphasize that just "running pnacl/build.sh driver" is often not good enough anymore
Advertise the new "driver-install-translator" mode as part of the standard 
help text. This is to emphasize that just "running pnacl/build.sh driver"
is often not good enough anymore

TEST=none
BUG=none
Review URL: https://chromiumcodereview.appspot.com/10222028

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@8417 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client