message: Fixed compilation for Linux
diff: @@ -358,7 +358,11 @@ libbitcoin_consensus_a_SOURCES = \
  crypto/MerkleTreeProof/blake2/blake2.h \
  crypto/MerkleTreeProof/blake2/blamka-round-opt.h \
  crypto/MerkleTreeProof/blake2/blake2-impl.h \
  - crypto/MerkleTreeProof/blake2/blamka-round-ref.h
  + crypto/MerkleTreeProof/blake2/blamka-round-ref.h \
  + crypto/MerkleTreeProof/thread.c \
  + crypto/MerkleTreeProof/core.c \
  + crypto/MerkleTreeProof/ref.c \
  + crypto/MerkleTreeProof/blake2/blake2b.c
  # common: shared between zcoind, and zcoin-qt and non-server tools
  libbitcoin_common_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
  @@ -432,10 +436,6 @@ libbitcoin_util_a_SOURCES = \
  libzerocoin/Zerocoin.h \
  crypto/MerkleTreeProof/mtp.cpp \
  crypto/MerkleTreeProof/merkle-tree.cpp \
  - crypto/MerkleTreeProof/thread.c \
  - crypto/MerkleTreeProof/core.c \
  - crypto/MerkleTreeProof/ref.c \
  - crypto/MerkleTreeProof/blake2/blake2b.c \
  $(BITCOIN_CORE_H)
  if GLIBC_BACK_COMPAT
  