From-SVN: r17315

        * gcc.c (SWITCH_TAKES_ARG): Add 'V', 'B' and 'b'.
        (process_command): Increment n_switches for them.  Don't discard
        their args.  Validate them.
        (main): Escape " marks when creating COLLECT_GCC_OPTIONS.
        From Rohan Lenard.
        (process_command): Set include_prefixes from COMPILER_PATH.
        (main): Set COLLECT_GCC_OPTIONS sooner.
        * confiugre.in: Link ../ld/ld.new to collect-ld rather than real-ld.
        * tlink.c, hash.c, hash.h: New files.
        * Makefile.in (USE_COLLECT2): Always use collect2.
        (collect2): Depend on and link in hash.o and tlink.o.
        (tlink.o, hash.o): Add dependencies.

tlink patches from Jason.

From-SVN: r14769