base.bbclass: Remove and re-create when installing to ensure that it is empty

git-svn-id: https://svn.o-hand.com/repos/poky/trunk@2680 311d38ba-8fff-0310-9ca6-ca027cbcb966

meta/classes/base.bbclass

@@ -374,6 +374,12 @@ oe_machinstall() {
 	fi
 }
 
+# Remove and re-create ${D} so that is it guaranteed to be empty
+do_install_prepend() {
+        rm -rf ${D}
+        mkdir -p ${D}
+}
+
 addtask listtasks
 do_listtasks[nostamp] = "1"
 python do_listtasks() {