The main goal of this commit is to make it more easy to add or update any architecture we want to support (such as ARM64). Any changes we want to make would be done in the architectures.cmake file.
The secondary goal of this commit is to encourage a more architecture generic nomenclature. We shouldn't use i368/x86_64 unless we are dealing with code that is specific to those architectures.
The extra "${...}" was not necessary.
This allows DSYMs to be generated normally for all targets and still allows them to be disabled for specific targets via `<target_name>_NO_DSYM` (e.g. `JavaScriptCore_NO_DSYM`)
Currently x86_64 or i386 only builds fail to enter shell.
CMake generation flags:
Build x86_64 only: -DTARGET_i386=OFF
Build i386 only: -DTARGET_x86_64=OFF
The default is still to build FAT binaries for both.
