Update wasi submodule (#1345)

* Update wasi submodule

Removes some dependencies from the `witx` crate since WebAssembly/WASI#243

* Don't pull witx from two places

* Update submodule again

crates/wasi-common/wig/Cargo.toml

@@ -17,7 +17,7 @@ proc-macro = true
 quote = "1.0.2"
 proc-macro2 = "1.0.6"
 heck = "0.3.1"
-witx = { path = "WASI/tools/witx", version = "0.8.0" }
+witx = { path = "WASI/tools/witx", version = "0.8.4" }
 
 [badges]
 maintenance = { status = "actively-developed" }

crates/wiggle/Cargo.toml

@@ -16,7 +16,7 @@ proc-macro = true
 
 [dependencies]
 wiggle-generate = { path = "crates/generate", version = "0.1.0" }
-witx = "0.8.3"
+witx = { path = "../wasi-common/wig/WASI/tools/witx", version = "0.8.4" }
 syn = { version = "1.0", features = ["full"] }
 
 [dev-dependencies]

crates/wiggle/crates/generate/Cargo.toml

@@ -15,7 +15,7 @@ include = ["src/**/*", "LICENSE"]
 
 [dependencies]
 wiggle-runtime = { path = "../runtime", version = "0.1.0" }
-witx = "0.8.3"
+witx = { version = "0.8.4", path = "../../../wasi-common/wig/WASI/tools/witx" }
 quote = "1.0"
 proc-macro2 = "1.0"
 heck = "0.3"