Part 2 of the collect-utils library, now also used for collect2.

Part 2 of the collect-utils library, now also used for collect2.

        * Makefile.in (COLLECT2_OBJS): Add collect-utils.o.
        (LTO_WRAPPER_OBJS): New variable.
        (lto-wrapper$(exeext)): Use it.
        * collect2.c: Include "collect-utils.h".
        (verbose, debug): Remove variables.
        (at_file_supplied): No longer static.
        (tool_name): New variable.
        (do_wait, fork_execute, maybe_unlink): Don't declare.
        (tool_cleanup): No longer static.
        (notice): Remove function.
        (maybe_run_lto_and_relink, main, do_dsymutil): Add new arg to
        fork_execute calls.
        (collect_wait, do_wait, collect_execute): Remove functions.
        (maybe_unlink): No longer static.
        * collect2.h (verbose, debug): Don't declare.
        (at_file_supplied): Declare.
        * collect-utils.c (utils_cleanup): New arg from_signal.  All callers
        changed.
        (collect_execute): Replace with implementation from collect2, plus a
        new arg use_atfile.  All callers changed.
        (collect_wait): Replace with implementation from collect2.
        (maybe_unlink_file): Remove function.
        (fork_execute): Replace with implementation from collect2, plus a
        new arg use_atfile.  All callers changed.
        (do_wait): Add call to utils_cleanup to the error path.
        * collect-utils.h (collect_execute, fork_execute, utils_cleanup,
        tool_cleanup): Adjust declarations.
        * lto-wrapper.c (tool_cleanup): Add unused bool argument.
        * tlink.c: Include "collect-utils.h".
        (tlink_execute): New arg use_atfile.  All callers changed.
        (tlink_init, tlink_execute): Remove declarations.

From-SVN: r212020