Update hadoop's native lz4 copy to r131 versus the current r123 copy. Release notes for the versions are at https://github.com/Cyan4973/lz4/releases
- 30% performance improvement for clang
- GCC 4.9+ bug fixes
- New 32/64 bits, little/big endian and strict/efficient align detection routines (internal)
- Small decompression speed improvement
This is my first Hadoop patch, review/feedback appreciated.