Update XZ Utils to 5.0.5

src/liblzma/check/sha256.c

 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       sha256.c
 /// \brief      SHA-256
 ///
 /// \todo       Crypto++ has x86 ASM optimizations. They use SSE so if they
 ///             are imported to liblzma, SSE instructions need to be used
 ///             conditionally to keep the code working on older boxes.
-///             We could also support using some external libary for SHA-256.
 //
 //  This code is based on the code found from 7-Zip, which has a modified
 //  version of the SHA-256 found from Crypto++ <http://www.cryptopp.com/>.
 //  The code was modified a little to fit into liblzma.
 //
 //  Authors:    Kevin Springle
 //              Wei Dai
 //              Igor Pavlov
 //              Lasse Collin
 //
@@ skipping 172 matching lines @@
 
         check->buffer.u64[(64 - 8) / 8] = conv64be(check->state.sha256.size);
 
         process(check);
 
         for (size_t i = 0; i < 8; ++i)
                 check->buffer.u32[i] = conv32be(check->state.sha256.state[i]);
 
         return;
 }