lz4hc vs. lz4 performance on the LZHAM test corpus

Both use LZ4_decompress_safe(). lz4hc uses LZ4_compressHC2_limitedOutput(), lz4 uses LZ4_compress_limitedOutput().

22,827 total files, all files >= 1KB.

total 5374152762
lz4hc 2199213331
lz4   2575990728