test: add corpus to be used with fuzzers

Fuzzing tools uses evolutionary algorithms. Supplying seed corpus
consisting of good sample inputs is one of the best ways to improve
fuzz target’s coverage. Patch adds a corpuses that can be used with
existed fuzzers. The name of each file in the corpus is the sha1
checksum of its contents.

Corpus with http headers was added from [1] and [2].

1. https://google.github.io/oss-fuzz/getting-started/new-project-guide/
2. https://en.wikipedia.org/wiki/List_of_HTTP_header_fields
3. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers

The libFuzzer allow to minimize corpus with help of `-merge` flag:
when 1 is passed, any corpus inputs from the 2nd, 3rd etc. corpus
directories that trigger new code coverage will be merged into the
first corpus directory, when 0 is passed an existed corpus will be
minimized.

All provided corpuses in a patch were minimized.

Part of #1809

test/static/corpus/csv/0c90a17c7b7cb5163255c7b775a8b544fb62c59d

+"a,b,c\n"
+"1,\"\",\"\"\n"
+"2,3,4\n"

test/static/corpus/csv/0e76fc3bb39bac4f774e2ce3978e9b59bc4a04b7

+"first,last,address,city,zip\n"
+"John,Doe,120 any st.,\"Anytown, WW\",08123\n"

test/static/corpus/csv/11f7ab7d8c2d4da313081e3282ab8120f0330b90

+"a,b\n"
+"1,\"ha\n"
+"\"\"ha\"\"\n"
+"ha\"\n"
+"3,4\n"

test/static/corpus/csv/2ace62c1befa19e3ea37dd52be9f6d508c5163e6

+"
\ No newline at end of file

test/static/corpus/csv/3816dd9c9120fe6b3d806184874cc5c3e3a68df3

+",,\n"

test/static/corpus/csv/409c042df7f6a518972df1bc1287442e28719b6c

+"none,none,0\n"

test/static/corpus/csv/46b175b37b5c3f746fde0dd114ead9938c012cfc

+" a,b,c\n"
+"1,2,3\n"
+"4,5,а нет ли ошибок?\n"

test/static/corpus/csv/56754bc8c7346ef9fad5c2ae9c54cef0af72629c

+"key,val\n"
+"1,\"{\"\"type\"\": \"\"Point\"\", \"\"coordinates\"\": [102.0, 0.5]}\"\n"

test/static/corpus/csv/58f43ea1e6df023f3dd4be9f718e5d0382fb9697

+"a,b\n"
+"1,\"ha \"\"ha\"\" ha\"\n"
+"3,4\n"

test/static/corpus/csv/6d131d28c6e20c3a0a0b46c3aa7308d3029ab636

+"abc", "with,comma", "\"in quotes\"", "1 \" quote"

test/static/corpus/csv/7560cb86c281018ee2f80d840fd8e6aa73a609ef

+"a,b,c\n"
+"1,2,3\n"
+"\"Once upon \n"
+"a time\",5,6\n"
+"7,8,9\n"

test/static/corpus/csv/7b97db755e18dc519fbc49e5de19b5820b9441c1

+"\n \nabc\nc\"\",\"d\",de\n\nk";

test/static/corpus/csv/7ba0c88846fbcd28ad490df47f9ce4405d795303

+("123 , 5  ,       92    , 0, 0\n"
+"1, 12  34, 56, \"quote , \", 66\nok");

test/static/corpus/csv/8a14c110827e26cfdde3693bc5db6cd8673cdc8a

+"  www  , \"aa\"a , \"tt  \" \n"

test/static/corpus/csv/94c1799dfba59120dd6075ee60016b809a915ca8

+"1,2,3\r\n", "4,5,6", "", ""

test/static/corpus/csv/9e109f38c3948abe743bd116a34f05954f9ddd59

+"abc\tlonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglong\t0\n"

test/static/corpus/csv/d21ec5eaaab3c8db1f923674b7a3ee19ce35ed13

+"123,456,abcac,\'multiword field 4\'\n"

test/static/corpus/csv/d4a6d494cc2a06a0fee4873014210ec523d23750

+"123\t456\t\n" "0\t\t\n";

test/static/corpus/csv/eca825c9bdb276332d524134ddf370f7d18c2444

+",,"

test/static/corpus/csv/f9ba3e378e0409d66f946b31306de19edfe859bc

+"\ne\n\n \n\" \"\n\"quote isn't closed, sorry\n \noh";