message: Add missing distibution files
diff: @@ -465,13 +465,19 @@ libsigma_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
  libsigma_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
  libsigma_a_SOURCES = \
  libzerocoin/common/GeneratorVector.h \
  + libzerocoin/common/GeneratorVector.hpp \
  libzerocoin/sigma/R1Proof.h \
  libzerocoin/sigma/R1ProofGenerator.h \
  + libzerocoin/sigma/R1ProofGenerator.hpp \
  libzerocoin/sigma/R1ProofVerifier.h \
  + libzerocoin/sigma/R1ProofVerifier.hpp \
  libzerocoin/sigma/SigmaPlusProof.h \
  libzerocoin/sigma/SigmaPlusProver.h \
  + libzerocoin/sigma/SigmaPlusProver.hpp \
  libzerocoin/sigma/SigmaPlusVerifier.h \
  + libzerocoin/sigma/SigmaPlusVerifier.hpp \
  libzerocoin/sigma/SigmaPrimitives.h \
  + libzerocoin/sigma/SigmaPrimitives.hpp \
  libzerocoin/sigma/Coin.h \
  libzerocoin/sigma/Coin.cpp \
  libzerocoin/sigma/CoinSpend.cpp \
  @@ -479,7 +485,8 @@ libsigma_a_SOURCES = \
  libzerocoin/sigma/SpendMetaDataV3.cpp \
  libzerocoin/sigma/SpendMetaDataV3.h \
  libzerocoin/sigma/Params.h \
  - libzerocoin/sigma/Params.cpp
  + libzerocoin/sigma/Params.cpp \
  + libzerocoin/sigma/OpenSSL_context.h
  if GLIBC_BACK_COMPAT
  libbitcoin_util_a_SOURCES += compat/glibc_compat.cpp
  