Reorganize wasi-misc-tests. (#575)

* Reorganize wasi-misc-tests.

Move wasi-misc-tests out of wasi-common, to break a dependency cycle;
previously, wasmtime-* depended on wasi-common, but wasi-common
dev-dependended on wasmtime-*.

Now, wasi-common no longer dev-depends on wasmtime-*; instead, the
tests are in their own crate which depends on wasi-common and on
wasmtime-*.

Also, rename wasi-misc-tests to wasi-tests for simplicity.

This also removes the "wasm_tests" feature; it's replaced by the
"test-programs" feature.

* Update the CI script to use the new feature name.

* Update the CI script to use the new feature name in one more place.

* Change a `write!` to a `writeln!`.

crates/wasi-common/Cargo.toml

@@ -10,11 +10,6 @@ repository = "https://github.com/bytecodealliance/wasmtime"
 readme = "README.md"
 edition = "2018"
 
-[features]
-# this feature requires wasm32-wasi target installed, and it enables wasm32
-# integration tests when run with `cargo test --features wasm_tests`
-wasm_tests = []
-
 [dependencies]
 wasi-common-cbindgen = { path = "wasi-common-cbindgen" }
 anyhow = "1.0"
@@ -36,21 +31,6 @@ winx = { path = "winx" }
 winapi = "0.3"
 cpu-time = "1.0"
 
-[dev-dependencies]
-wasmtime-runtime = { path = "../runtime" }
-wasmtime-environ = { path = "../environ" }
-wasmtime-jit = { path = "../jit" }
-wasmtime-wasi = { path = "../wasi" }
-wasmtime = { path = "../api" }
-cranelift-codegen = "0.50.0"
-target-lexicon = "0.9.0"
-pretty_env_logger = "0.3.0"
-tempfile = "3.1.0"
-os_pipe = "0.9"
-
-[build-dependencies]
-cfg-if = "0.1.9"
-
 [lib]
 name = "wasi_common"
 crate-type = ["rlib", "staticlib", "cdylib"]