Cleanup function

cb-helper

@@ -242,8 +242,15 @@ function flash() {
   fi
 }
 
+function clean() {
+  printf "Clean source and build directories"
+  rm -rf ./coreboot/
+  rm -rf ./grub/
+  rm -rf ./me_cleaner/
+}
+
 function doit() {
-  echo "Downloading, building and installing everything"
+  printf "Download, build and install"
   download_code
   build_utils
   split_bios