update Snappy 1.1.10

[ChristianSchindler]

Update to Snappy 1.1.10 https://github.com/google/snappy/releases/tag/1.1.10

close #126

OLD:

./lzbench -r -v -esnappy silesia
Compressor name         Compress. Decompress. Compr. size  Ratio Filename
memcpy                  51114 MB/s 50611 MB/s    10192446 100.00 silesia/dickens
snappy 2020-07-11         268 MB/s   907 MB/s     6340267  62.21 silesia/dickens
snappy 2020-07-11         474 MB/s  1631 MB/s    26690826  52.11 silesia/mozilla
snappy 2020-07-11         512 MB/s  1333 MB/s     5440451  54.57 silesia/mr
snappy 2020-07-11         973 MB/s  3241 MB/s     6146795  18.32 silesia/nci
snappy 2020-07-11         358 MB/s  1490 MB/s     4311901  70.09 silesia/ooffice
snappy 2020-07-11         583 MB/s  2185 MB/s     5412825  53.67 silesia/osdb
snappy 2020-07-11         325 MB/s  1053 MB/s     3234968  48.81 silesia/reymont
snappy 2020-07-11         543 MB/s  1913 MB/s     8057361  37.29 silesia/samba
snappy 2020-07-11         403 MB/s  1487 MB/s     6469352  89.21 silesia/sao
snappy 2020-07-11         328 MB/s  1190 MB/s    20211213  48.75 silesia/webster
snappy 2020-07-11         661 MB/s  2538 MB/s     1308581  24.48 silesia/xml
snappy 2020-07-11       13950 MB/s 32478 MB/s     8459794  99.83 silesia/x-ray

NEW:

./lzbench -r -v -esnappy silesia
Compressor name         Compress. Decompress. Compr. size  Ratio Filename
memcpy                  50432 MB/s 47656 MB/s    10192446 100.00 silesia/dickens
snappy 1.1.10             279 MB/s   663 MB/s     6354485  62.35 silesia/dickens
snappy 1.1.10             495 MB/s  1067 MB/s    26691740  52.11 silesia/mozilla
snappy 1.1.10             536 MB/s   962 MB/s     5436533  54.53 silesia/mr
snappy 1.1.10            1015 MB/s  2062 MB/s     6175634  18.41 silesia/nci
snappy 1.1.10             375 MB/s   947 MB/s     4313101  70.11 silesia/ooffice
snappy 1.1.10             603 MB/s  1435 MB/s     5432987  53.87 silesia/osdb
snappy 1.1.10             339 MB/s   800 MB/s     3240364  48.89 silesia/reymont
snappy 1.1.10             571 MB/s  1333 MB/s     8065441  37.33 silesia/samba
snappy 1.1.10             422 MB/s  1107 MB/s     6470067  89.22 silesia/sao
snappy 1.1.10             345 MB/s   870 MB/s    20216042  48.76 silesia/webster
snappy 1.1.10             695 MB/s  1777 MB/s     1309355  24.50 silesia/xml
snappy 1.1.10           14992 MB/s 28533 MB/s     8461110  99.85 silesia/x-ray