a fix on iOS package and running on iPhone Simulator 9.x

[sprhawk]

my clone : https://bitbucket.org/sprhawk/ogre (a pull request is created).

prebuilt SDK for iOS: http://yun.baidu.com/share/link?shareid ... 4217681279

There is a problem: before build samples, need to replace /opt/local/lib/libz.dylib with -lz in other linker flags .