gnulib-tool: change default --aux-dir

[Bruno Haible]

The default --aux-dir of "." clutters up the top-level directory.
Now that have agreed on a reasonable name for this directory, gnulib-tool
does not need to do this any more. I'm changing the default --aux-dir
to "build-aux".

Note: This is an INCOMPATIBLE change. You need to add an option
--aux-dir=. if you want to keep the previous behaviour.


        * gnulib-tool (import): Change --aux-dir default to "build-aux".

*** gnulib-tool.bak     2005-08-25 00:56:16.000000000 +0200
--- gnulib-tool 2005-08-25 01:10:57.000000000 +0200
***************
*** 89,95 ****
        --m4-base=DIRECTORY   Directory relative --dir where *.m4 macros are
                              placed (default \"m4\"), for --import.
        --aux-dir=DIRECTORY   Directory relative --dir where auxiliary build
!                             tools are placed (default \".\"), for --import.
        --avoid=MODULE        Avoid including the given MODULE. Useful if you
                              have code that provides equivalent functionality.
                              This option can be repeated.
--- 89,96 ----
        --m4-base=DIRECTORY   Directory relative --dir where *.m4 macros are
                              placed (default \"m4\"), for --import.
        --aux-dir=DIRECTORY   Directory relative --dir where auxiliary build
!                             tools are placed (default \"build-aux\"),
!                             for --import.
        --avoid=MODULE        Avoid including the given MODULE. Useful if you
                              have code that provides equivalent functionality.
                              This option can be repeated.
***************
*** 997,1003 ****
  
      # Set up auxiliary directory.
      test -z "$auxdir" && auxdir="$ac_auxdir"
!     test -z "$auxdir" && auxdir="."
      test -d "$destdir/$auxdir" \
        || (test -z "$dry_run" && mkdir "$destdir/$auxdir") \
        || func_fatal_error "aux directory $destdir/$auxdir doesn't exist"
--- 998,1004 ----
  
      # Set up auxiliary directory.
      test -z "$auxdir" && auxdir="$ac_auxdir"
!     test -z "$auxdir" && auxdir="build-aux"
      test -d "$destdir/$auxdir" \
        || (test -z "$dry_run" && mkdir "$destdir/$auxdir") \
        || func_fatal_error "aux directory $destdir/$auxdir doesn't exist"