gnulib-tool: small tweak

[Bruno Haible]

This change is to use { ... } syntax instead of ( ... ) where possible.
( ... ) causes a subshell to be fork()ed, { ... } doesn't.


        * gnulib-tool (import): Use compound statement instead of subshell
        where possible.

*** gnulib-tool.bak     2005-08-25 00:56:16.000000000 +0200
--- gnulib-tool 2005-08-25 01:22:21.000000000 +0200
***************
*** 985,1005 ****
      test -z "$sourcebase" && sourcebase="$ac_sourcebase"
      test -z "$sourcebase" && sourcebase="lib"
      test -d "$destdir/$sourcebase" \
!       || (test -z "$dry_run" && mkdir "$destdir/$sourcebase") \
        || func_fatal_error "source base $destdir/$sourcebase doesn't exist"
  
      # Set up m4 base.
      test -z "$m4base" && m4base="$ac_m4base"
      test -z "$m4base" && m4base="m4"
      test -d "$destdir/$m4base" \
!       || (test -z "$dry_run" && mkdir "$destdir/$m4base") \
        || func_fatal_error "m4 base $destdir/$m4base doesn't exist"
  
      # 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"
  
      # Using libtool?
--- 986,1006 ----
      test -z "$sourcebase" && sourcebase="$ac_sourcebase"
      test -z "$sourcebase" && sourcebase="lib"
      test -d "$destdir/$sourcebase" \
!       || { test -z "$dry_run" && mkdir "$destdir/$sourcebase"; } \
        || func_fatal_error "source base $destdir/$sourcebase doesn't exist"
  
      # Set up m4 base.
      test -z "$m4base" && m4base="$ac_m4base"
      test -z "$m4base" && m4base="m4"
      test -d "$destdir/$m4base" \
!       || { test -z "$dry_run" && mkdir "$destdir/$m4base"; } \
        || func_fatal_error "m4 base $destdir/$m4base doesn't exist"
  
      # 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"
  
      # Using libtool?