Moved man-po pot file creation into Makefile

The pot files for man-po are part of the extra_dist target so are
built at dist time. These used to be created as part of the dist-hook.
However it is better to control their builds in the Makefile so they
are conditionally built. It also means distcheck doesn't complain when
they are added to the CLEANFILES.

Makefile.am

@@ -54,7 +54,8 @@ EXTRA_DIST = \
 	misc/git-version-gen \
 	Documentation/CodingStyle \
 	Documentation/TODO \
-	sysctl.conf
+	sysctl.conf \
+	$(DIST_MAN_POTS)
 
 if BUILD_PIDOF
 usrbin_exec_PROGRAMS += pidof
@@ -122,19 +123,37 @@ dist_procpsng_DATA = \
 
 BUILT_SOURCES = $(top_srcdir)/.version
 
-clean-local:
-	-rm man-po/template-man-ps.pot
-	-rm man-po/template-man-top.pot
-	-rm man-po/template-man.pot
-
 $(top_srcdir)/.version:
 	touch $(top_srcdir)/.version
 	echo $(VERSION) > $@-t && mv $@-t $@
 dist-hook:
 	echo $(VERSION) > $(distdir)/.tarball-version
-	$(srcdir)/create-man-pot.sh
+# $(srcdir)/create-man-pot.sh
 	$(srcdir)/translate-man.sh
 
+MAN_PS_POT = man-po/template-man-ps.pot
+MAN_PS_POT_FILES = $(srcdir)/ps/ps.1
+MAN_TOP_POT = man-po/template-man-top.pot
+MAN_TOP_POT_FILES = $(srcdir)/top/top.1
+MAN_POT = man-po/template-man.pot
+MAN_POT_FILES = $(srcdir)/free.1 $(srcdir)/kill.1 $(srcdir)/pgrep.1 \
+		  $(srcdir)/pidof.1 $(srcdir)/pkill.1 $(srcdir)/pmap.1 \
+		  $(srcdir)/pwdx.1 $(srcdir)/skill.1 $(srcdir)/slabtop.1 \
+		  $(srcdir)/snice.1 $(srcdir)/sysctl.8 $(srcdir)/uptime.1 \
+		  $(srcdir)/sysctl.conf.5 $(srcdir)/tload.1 \
+		  $(srcdir)/vmstat.8 $(srcdir)/w.1 $(srcdir)/watch.1
+DIST_MAN_POTS = $(MAN_PS_POT) $(MAN_TOP_POT) $(MAN_POT)
+CLEANFILES = $(DIST_MAN_POTS)
+
+$(MAN_PS_POT): $(MAN_PS_POT_FILES)
+	po4a-updatepo -f man -m $< -p $@
+
+$(MAN_TOP_POT): $(MAN_TOP_POT_FILES)
+	po4a-updatepo -f man -m $< -p $@
+
+$(MAN_POT): $(MAN_POT_FILES)
+	po4a-updatepo -f man -m $< -p $@
+
 get-trans:
 	echo "Getting the latest translations from translationproject.org..."
 	rsync -Lrtvz  translationproject.org::tp/latest/procps-ng/  po