fix release filelist

Makefile

@@ -84,7 +84,7 @@ install_prereqs_ubuntu : check_prereqs
 release_filelist:
 	echo ".UNITTEST"
 	echo ".mlintopts"
-	find * -type f | grep -v "pod-build" | grep -v ".valgrind" | grep -v ".viewer-prefs" | grep -v ".out" | grep -v ".autosave" | grep -v ".git" | grep -v ".tmp" | grep -v "drake_config.mat" | grep -v "DoxygenMatlab" | grep -v ".aux" | grep -v ".d" | grep -v ".log" | grep -v ".bib"
+	find * -type f | grep -v "pod-build" | grep -v "\.valgrind" | grep -v "\.viewer-prefs" | grep -v "\.out" | grep -v "\.autosave" | grep -v "\.git" | grep -v "\.tmp" | grep -v "drake_config\.mat" | grep -v "DoxygenMatlab" | grep -v "\.aux" | grep -v "\.d" | grep -v "\.log" | grep -v "\.bib"
 
 clean:
 	-if [ -e pod-build/install_manifest.txt ]; then rm -f `cat pod-build/install_manifest.txt`; fi