message: Add cwd to log messages.
diff: @@ -89,6 +89,7 @@ export class Builder {
  if (rootFile !== undefined) {
  args = args.map(this.replaceArgumentPlaceholders(rootFile, this.tmpDir))
  }
  + this.extension.logger.addLogMessage(`cwd: ${wd}`)
  this.currentProcess = cp.spawn(command, args, {cwd: wd})
  const pid = this.currentProcess.pid
  this.extension.logger.addLogMessage(`External build process spawned. PID: ${pid}.`)
  @@ -248,6 +249,7 @@ export class Builder {
  if (args) {
  command += ' ' + args[0]
  }
  + this.extension.logger.addLogMessage(`cwd: ${path.dirname(rootFile)}`)
  this.currentProcess = cp.spawn(command, [], {cwd: path.dirname(rootFile), env: envVars, shell: true})
  } else {
  let workingDirectory: string
  @@ -256,6 +258,7 @@ export class Builder {
  } else {
  workingDirectory = path.dirname(rootFile)
  }
  + this.extension.logger.addLogMessage(`cwd: ${workingDirectory}`)
  this.currentProcess = cp.spawn(steps[index].command, steps[index].args, {cwd: workingDirectory, env: envVars})
  }
  const pid = this.currentProcess.pid
  