Revert "base/utility-tasks.bbclass: Drop do_setscene and do_rebuild"

This reverts commit 6d79765420.

The orignal patch broke the incremental build, so not all is right
with this change yet.

Signed-off-by: Saul Wold <sgw@linux.intel.com>

meta/classes/utility-tasks.bbclass

@@ -28,6 +28,25 @@ python do_clean() {
 		bb.build.exec_func(f, d)
 }
 
+addtask rebuild after do_${BB_DEFAULT_TASK}
+do_rebuild[dirs] = "${TOPDIR}"
+do_rebuild[nostamp] = "1"
+python do_rebuild() {
+	"""rebuild a package"""
+}
+
+#addtask mrproper
+#do_mrproper[dirs] = "${TOPDIR}"
+#do_mrproper[nostamp] = "1"
+#python do_mrproper() {
+#	"""clear downloaded sources, build and temp directories"""
+#	dir = bb.data.expand("${DL_DIR}", d)
+#	if dir == '/': bb.build.FuncFailed("wrong DATADIR")
+#	bb.debug(2, "removing " + dir)
+#	os.system('rm -rf ' + dir)
+#	bb.build.exec_func('do_clean', d)
+#}
+
 addtask checkuri
 do_checkuri[nostamp] = "1"
 python do_checkuri() {