Increase days for changelog

Change-Id: Ic0227db2695d9e5aa9461a0aca28169fb075e7ea
diff --git a/tools/changelog b/tools/changelog
index 546b735..c33b243 100755
--- a/tools/changelog
+++ b/tools/changelog
@@ -16,7 +16,7 @@
 # Print something to build output
 echo ${bldppl}"Generating changelog..."${txtrst}
 
-for i in $(seq 5);
+for i in $(seq 15);
 do
 export After_Date=`date --date="$i days ago" +%m-%d-%Y`
 k=$(expr $i - 1)