Sync locale Makefile from plugin template

.tx/config

@@ -6,5 +6,5 @@ file_filter = locale/<lang>/foreman_templates.edit.po
 source_file = locale/foreman_templates.pot
 source_lang = en
 type = PO
-minimum_perc = 50
+minimum_perc = 0
 resource_name = foreman_templates

locale/Makefile

@@ -31,9 +31,16 @@ all-mo: $(MOFILES)
  cat $@
  ! grep -q msgid $@
 
-%.edit.po:
+%.edit.po: %.po.time_stamp
  touch $@
 
+# gettext will trash the .edit.po file if the time stamp doesn't exist or is older than the po file
+%.po.time_stamp: %.po
+ touch --reference $< $@
+
+# Prevent make from treating this as an intermediate file to be cleaned up
+.PRECIOUS: %.po.time_stamp
+
 check: $(POXFILES)
 
 # Unify duplicate translations
@@ -43,7 +50,10 @@ uniq-po:
  done
 
 tx-pull: $(EDITFILES)
- cd .. && tx pull -f --all
+ # Initialize new languages
+ cd .. && tx pull -f --all --minimum-perc 50
+ # Force update all existing languages
+ cd .. && tx pull -f --minimum-perc 0
  for f in $(EDITFILES) ; do \
  sed -i 's/^\("Project-Id-Version: \).*$$/\1$(DOMAIN) $(VERSION)\\n"/' $$f; \
  done