Preserve timestamps, thanks Parag.

https://bugzilla.redhat.com/show_bug.cgi?id=xmltoman-review#c2

diff -urp xmltoman-0.3.orig/Makefile xmltoman-0.3/Makefile

--- xmltoman-0.3.orig/Makefile	2003-10-03 15:43:17.000000000 +0200

+++ xmltoman-0.3/Makefile	2008-03-12 13:16:56.000000000 +0100

@@ -12,12 +12,12 @@ xmltoman.1: xml/xmltoman.1.xml

 xmlmantohtml.1: xml/xmlmantohtml.1.xml

 	./xmltoman $< > $@

-install:

-	install -D xmltoman $(DESTDIR)/$(PREFIX)/bin/xmltoman

-	install -D xmlmantohtml $(DESTDIR)/$(PREFIX)/bin/xmlmantohtml

-	install -D -m 0644 xmltoman.dtd $(DESTDIR)/$(PREFIX)/share/xmltoman/xmltoman.dtd

-	install -D -m 0644 xmltoman.css $(DESTDIR)/$(PREFIX)/share/xmltoman/xmltoman.css

-	install -D -m 0644 xmltoman.xsl $(DESTDIR)/$(PREFIX)/share/xmltoman/xmltoman.xsl

+install:

+	install -p -D xmltoman $(DESTDIR)/$(PREFIX)/bin/xmltoman

+	install -p -D xmlmantohtml $(DESTDIR)/$(PREFIX)/bin/xmlmantohtml

+	install -p -D -m 0644 xmltoman.dtd $(DESTDIR)/$(PREFIX)/share/xmltoman/xmltoman.dtd

+	install -p -D -m 0644 xmltoman.css $(DESTDIR)/$(PREFIX)/share/xmltoman/xmltoman.css

+	install -p -D -m 0644 xmltoman.xsl $(DESTDIR)/$(PREFIX)/share/xmltoman/xmltoman.xsl

 dist:

 	[ -d $(DISTNAME) ] && rm -rf $(DISTNAME) || true