Handle target specific outputs such as .wasm or .dll.lib

Handle target specific outputs such as .wasm or .dll.lib

Fixes #4500, #4535

Until now, Cargo does not have any knowledge about target-specific
output files. It relies solely on rustc for this sort of information
(`rustc --print=file-names ...`).

As a result, Cargo does not place some build artifacts (files) to
target/{debug,release} directory. These files include *.wasm
for wasm32-unknown-emscripten target and *.dll.lib for
*-pc-windows-msvc cdylib target.

This commit will add such knowledge to Cargo so that *.wasm and
*.dll.lib will be placed in target/{debug,release} directory.