Remove verbose messages from suppliers.mk generation

* build-aux/Makefile.am (suppliers.mk): Invoke ant with `-q` to eliminate
"processing" messages for each and every file.  This also speeds up
operation slightly.
* build-aux/gen-make: Remove information echos for each file.

These changes will allow for suppliers.mk to be regenerated automatically
without being so invasive.

RELEASES.md

@@ -39,6 +39,8 @@ Build System
   accommodate liza-proguic's step-level package generation.
 - Step-level program packages are now properly accounted for as dependencies
   for builds.
+- `supplier.mk` generation will no longer be verbose (it'll instead be only
+  one line), which makes it more amenable to more frequent regeneration.
 
 
 v17.7.0 (2020-12-09)

build-aux/Makefile.am

@@ -262,7 +262,7 @@ clean:
 # that territory and rate packages also have includes; see top of this file for
 # an explanation
 suppliers.mk: $(path_ui)/package-dfns.xml
-	$(ant) pkg-dep
+	$(ant) -q pkg-dep
 	find $(path_ui)/program/ -name '*.dep' | xargs cat $(path_ui)/program.dep | sort -u \
 	  > $(path_ui)/package-dfns.dep
 	$(RM) $(path_ui)/program.dep

build-aux/gen-make

@@ -60,7 +60,6 @@ resolv-path()
 
 until [ $# -eq 0 ]; do (
   path="${1%%/}"
-  echo "[gen-make] scanning $path" >&2
 
   cd "$path" || exit $?
 
@@ -72,8 +71,6 @@ until [ $# -eq 0 ]; do (
     d="${dpath##*/}"
     sansext="${d%.*}"
 
-    echo "[gen-make] found $path/$d" >&2
-
     # this might be derived from another file
     # TODO: handle all cases, not just typelists!
     if [ -f "$sansext.typelist" ]; then