MCWasmObjectTargetWriter and TargetIntrinsicInfo never appear in the
file. ARMTargetStreamer is declared on all platforms so move it from
the ARM-only target to the shared target.

Bug: chromium:971333
Change-Id: I04229323af68e5b4d24a1d5ad6524c96460108eb
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/32428Tested-by: Saman Sami <samans@chromium.org>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>