Don't pollute the source directory

Dependencies

• [2] UPRNM2PP configure.ac: Declare we're using the serial test harness
• [*] FV2M6MOT hydra: use autoconf/-make
• [*] QNX2BXVA hydra: Improve `AC_INIT' call.

Change contents

• edit in configure.ac at line 3
  [5.138]

  [2.0]
  + AC_CONFIG_AUX_DIR(config)