[PATCH 1 of 2 STABLE] make: introduce a target to clean everything but packages

[Pierre-Yves David]

# HG changeset patch
# User Pierre-Yves David <pierre-yves.david at ens-lyon.org>
# Date 1469745599 -7200
#      Fri Jul 29 00:39:59 2016 +0200
# Branch stable
# Node ID a52f8af0393b37ab6ddd8de4d91ee7d9cf2c36aa
# Parent  387bdd53c77e9f61bd7b0d491717440f7f57563a
make: introduce a target to clean everything but packages

Removing the 'packages' directory makes nightly builder life much harder.

diff -r 387bdd53c77e -r a52f8af0393b Makefile
--- a/Makefile	Mon Jul 25 12:00:55 2016 -0700
+++ b/Makefile	Fri Jul 29 00:39:59 2016 +0200
@@ -60,7 +60,7 @@ wheel:
 doc:
 	$(MAKE) -C doc
 
-clean:
+cleanbutpackages:
 	-$(PYTHON) setup.py clean --all # ignore errors from this command
 	find contrib doc hgext hgext3rd i18n mercurial tests \
 		\( -name '*.py[cdo]' -o -name '*.so' \) -exec rm -f '{}' ';'
@@ -68,10 +68,13 @@ clean:
 	rm -f MANIFEST MANIFEST.in hgext/__index__.py tests/*.err
 	rm -f mercurial/__modulepolicy__.py
 	if test -d .hg; then rm -f mercurial/__version__.py; fi
-	rm -rf build packages mercurial/locale
+	rm -rf build mercurial/locale
 	$(MAKE) -C doc clean
 	$(MAKE) -C contrib/chg distclean
 
+clean: cleanbutpackages
+	rm -rf packages
+
 install: install-bin install-doc
 
 install-bin: build