xcode 4.2 itunesconnect 上传时 At least one of the following architecture(s) must be present: armv6

Xcode升级到了4.2GM版，编译的时候遇到这个错误提示：

iPhone/iPod Touch: application executable is missing a required architecture. At least one of the following architecture(s) must be present: armv6 (-19033)

找了半天都不知道在哪里设置，最终还是万能的Stackoverflow靠得住。

解决方案是：在Target的Build Settings里，找到Architectures，点击"Standard(armv7)"，再点"Other..."，把原来的内容删掉，在分两行输入"armv6"和"armv7"，搞定。（如下图）