(read_function_mappins): Use qsort to sort the symbols.
        (search_mapped_symbol): New function.
        (core_create_function_syms): Use bsearch to find symbols.
        * corefile.h (struct function_map): Add new bit-field: is_first.
        * cg_print.c (cmp_symbol_map): New function.
        (cg_print_file_ordering): Sort the symbol map.