[HLLCompiler]: * Fix meaning of --output option to default to standard output if not   specified. * (Corrects pgc problem introduced in r15967.)
[HLLCompiler]:
* Fix meaning of --output option to default to standard output if not
  specified.
* (Corrects pgc problem introduced in r15967.)


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@15968 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot