[dunecontrol] Warn less pushy that build directory is not set.

The warning was spilled out for every module for every command,
even for update.
The build directory is announced by CMake's configure anyway.
Now it is printed for make, too.

bin/dunecontrol

@@ -218,7 +218,6 @@ load_opts() {
 
   if test "x$USE_CMAKE" != "xno"; then
     if test -z "$BUILDDIR"; then
-      echo "No build directory provided. Defaulting to the sub directory build-cmake"
       export BUILDDIR=build-cmake
     fi
   fi
@@ -722,6 +721,7 @@ run_default_configure () {
 run_default_make () {
   test ! -d "$ABS_BUILDDIR" || cd "$ABS_BUILDDIR"
   PARAMS="$CMD_FLAGS"
+  echo "build directory: $BUILDDIR"
   echo make "$PARAMS"
   eval $MAKE "$PARAMS"
 }