Add more expected files

tests/expected/asctime.stderr

tests/expected/asctime.stdout

tests/expected/getc_unget.stderr

tests/expected/getc_unget.stdout

tests/expected/getid.stderr

tests/expected/getid.stdout

tests/expected/gmtime.stderr

tests/expected/gmtime.stdout

tests/expected/link.stderr

tests/expected/rename.stderr

tests/expected/rename.stdout

tests/expected/stdio/all.stderr

tests/expected/stdio/all.stdout

tests/expected/stdio/freopen.stderr

tests/expected/stdio/freopen.stdout

tests/expected/stdio/fwrite.stderr

tests/expected/stdio/fwrite.stdout

tests/expected/stdlib/bsearch.stderr

tests/expected/stdlib/bsearch.stdout

tests/expected/stdlib/mktemp.stderr