fix integer overflow in literals decompression, port of the fix in r118
Merge pull request #40 from luben/fix-literal-overrun

fix integer overflow in literals decompression, port of the fix in r118
Update lz4 to r119 and xxhash to r34.
update lz4 and xxhash

expose ability to set compression level for LZ4-HC introduced in lz4 r113

Signed-off-by: Linnaea Von Lavia <linnaea-von-lavia@live.com>
Merge remote-tracking branch 'origin/master'