When make clean:
| Makefile is older than the configure script.
| Please re-run the configure script.
| make: *** [Makefile] Error 1
(From OE-Core rev: 6f9753b32176efe1390382fc5a0317ba267d640d)
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>