Process the -dumpspecs, -dumpversion, and -dumpmachine options without
complaining about a lack of input files.
gcc/cobol/ChangeLog:
PR cobol/119332
* gcobolspec.cc (lang_specific_driver): Add -dumpspecs,
-dumpversion, -dumpmachine to the no_files_error=false cases.
case OPT_print_multi_os_directory:
case OPT_print_multiarch:
case OPT_print_sysroot_headers_suffix:
+ case OPT_dumpmachine:
+ case OPT_dumpversion:
+ case OPT_dumpspecs:
no_files_error = false;
break;