message: Added pos.h and pos.cpp in the makefile.
diff: @@ -134,6 +134,7 @@ BITCOIN_CORE_H = \
  policy/policy.h \
  policy/rbf.h \
  pow.h \
  + pos.h \
  protocol.h \
  random.h \
  reverselock.h \
  @@ -210,6 +211,7 @@ libbitcoin_server_a_SOURCES = \
  policy/fees.cpp \
  policy/policy.cpp \
  pow.cpp \
  + pos.cpp \
  rest.cpp \
  rpc/blockchain.cpp \
  rpc/mining.cpp \
  