Kbuild: Clean target fix.

This commit fix an error with the clean targets.
The package directory does not exist anymore.

Change-Id: I415085cb35eda9a1f30d6b53a5529e1fb2a8447a
Signed-off-by: Juan Manuel Cruz <juan.m.cruz.alcaraz@linux.intel.com>
diff --git a/scripts/Makefile b/scripts/Makefile
index 000841b..7b2d684 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -21,4 +21,4 @@
 subdir-$(CONFIG_MODVERSIONS) += genksyms
 
 # Let clean descend into subdirs
-subdir-	+= basic kconfig package gen_idt
+subdir-	+= basic kconfig gen_idt