message: builder-keys: add jamesob
  This is also the key I sign GitHub commits with.
diff: @@ -19,6 +19,7 @@ D35176BE9264832E4ACA8986BF0792FBE95DC863 fivepiece (fivepiece)
  01CDF4627A3B88AAE4A571C87588242FBE38D3A8 Gavin Andresen (gavinandresen)
  D1DBF2C4B96F2DEBF4C16654410108112E7EA81F Hennadii Stepanov (hebasto)
  A2FD494D0021AA9B4FA58F759102B7AE654A4A5A Ilyas Ridhuan (IlyasRidhuan)
  +2688F5A9A4BE0F295E921E8A25F27A38A47AD566 James O'Beirne (jamesob)
  D3F22A3A4C366C2DCB66D3722DA9C5A7FA81EA35 Jarol Rodriguez (jarolrod)
  7480909378D544EA6B6DCEB7535B12980BB8A4D3 Jeffri H Frontz (jhfrontz)
  D3CC177286005BB8FF673294C5242A1AB3936517 jl2012 (jl2012)
  