Fixed an issue with the build

Author: mtiller

text/Makefile

@@ -96,8 +96,8 @@ icons:
 # This creates links for the JS and JSON and puts the sitemap and robots
 # files where they need to be
 build_links:
-	mv build/dirhtml/_static/sitemap.xml build/dirhtml
-	mv build/dirhtml/_static/robots.txt build/dirhtml
+	cp build/dirhtml/_static/sitemap.xml build/dirhtml
+	cp build/dirhtml/_static/robots.txt build/dirhtml
 
 	-(cd build/dirhtml/_static; ln -s ../../../results/js)
 	-(cd build/dirhtml/_static; ln -s ../../../results/json)