explicitly set '-O3 -DNDEBUG'. setting CFLAGS on the command line
overrides the default, resulting in -O0.
Change-Id: I213979f646b1444b1d8e0eb0bb58e9b2c3cc4dd3
This build script (iosbuild.sh) will build for following platforms:
iPhoneSimulator, iPhoneOS-V7 & iPhoneOS-V7s
Change-Id: Icbb69e00277a4164f848b8766089302e299506e0