* i386/bsd.h (ASM_FILE_START): Don't use dump_base_name, it is
        wrong and should only be used for dump related things, not
        debugging information, instead main_input_filename should be used.
        Also, reuse output_file_directive if possible.
        * i386/aix386ng.h (ASM_FILE_START): Likewise.
        * i386/isc.h (ASM_FILE_START): Likewise.
        * i386/win-nt.h (ASM_FILE_START): Likewise.
        * i386/sun386.h (ASM_FILE_START): Likewise.

From-SVN: r24174