Before this patch, by default Waffle built for JellyBean. If one wanted to
build for IceCreamSandwich, then one needed to manually add
-DBUILD_FOR_ICS to the CFLAGS environment variable.

Now, Waffle automatically detects the Android platform's version via
makefile magic and adds two macros to LOCAL_C_FLAGS:
    -DWAFFLE_ANDROID_MAJOR_VERSION=...
    -DWAFFLE_ANDROID_MINOR_VERSION=...

Waffle uses these macros to determine which Android platform it is
building against. The macro BUILD_FOR_ICS is no longer used.

Signed-off-by: Chad Versace <chad.versace@linux.intel.com>