message: Update windows rebuild-bitcoin.bat script to account for
  bitcoin-miner.exe
  When finished building all binaries we need to copy the
  bitcoin-miner.exe to the correct build output folder along with all the
  other binaries.
diff: @@ -150,6 +150,7 @@ cd "%BITCOIN_GIT_ROOT%\src"
  copy bitcoin-tx.exe "%BUILD_OUTPUT%\bitcoin-tx.exe"
  copy bitcoin-cli.exe "%BUILD_OUTPUT%\bitcoin-cli.exe"
  copy bitcoind.exe "%BUILD_OUTPUT%\bitcoind.exe"
  +copy bitcoin-miner.exe "%BUILD_OUTPUT%\bitcoin-miner.exe"
  REM cd to src\qt to copy bitcoin-qt.exe
  cd qt
  