builds are broken due to wasmtime pch/wiggle_relative_paths branch being deleted

[froydnj]

e.g. we have:

lucet/lucet-wiggle/Cargo.toml

Lines 17 to 24 in 62f4128

	wiggle-generate = { git = "https://github.com/bytecodealliance/wasmtime", branch = "pch/wiggle_relative_paths" }
	witx = "0.8.3"
	syn = { version = "1.0", features = ["full"] }
	[dev-dependencies]
	wiggle-runtime = { git = "https://github.com/bytecodealliance/wasmtime", branch = "pch/wiggle_relative_paths" }
	wiggle-test = { git = "https://github.com/bytecodealliance/wasmtime", branch = "pch/wiggle_relative_paths" }
	lucet-runtime = { path = "../lucet-runtime", version = "0.6.2-dev" }

But bytecodealliance/wasmtime#1294 indicates that branch got deleted.

/cc @pchickey

[pchickey]

Ah shit, sorry, I will fix that promptly

[pchickey]

Pushed directly to master 61babda

[froydnj]

Thank you!