* ltmain.in: Make sure $arg is set when linking `.lo' files into a

* ltmain.in: Make sure $arg is set when linking `.lo' files into a
program.  Moved tag decision code after check for recognized
source file extension (fixes "suffix" test failure).  Merged
Rhapsody support from main trunk.
(output_obj) Added missing '$' before "echo" command (fixes "sh"
test failure).
* tests/suffix.test: Corrected typo in error message, and improved
the message.