Fix changelog generation on some systems

Change-Id: Ie9be379af16c080373208ccc2d454a02c8685088
diff --git a/tools/changelog b/tools/changelog
index b8b9ae2..f4bd40b 100755
--- a/tools/changelog
+++ b/tools/changelog
@@ -16,9 +16,9 @@
 
 for i in $(seq 15);
 do
-export After_Date=`date --date="$i days ago" +%m-%d-%Y`
+export After_Date=`/bin/date --date="$i days ago" +%m-%d-%Y`
 k=$(expr $i - 1)
-	export Until_Date=`date --date="$k days ago" +%m-%d-%Y`
+	export Until_Date=`/bin/date --date="$k days ago" +%m-%d-%Y`
 
 	# Line with after --- until was too long for a small ListView
 	echo '====================' >> $Changelog;