add feature to enable filesystem support

Author: stlankes

examples/hermit-wasm/Cargo.toml

@@ -15,6 +15,7 @@ name = "hermit_wasm"
 
 [features]
 default = []
+fs = ["hermit/fs"]
 
 [dependencies]
 anyhow = "1.0"
@@ -30,4 +31,4 @@ zerocopy = { version = "0.8", default-features = false, features = ["alloc", "de
 [target.'cfg(target_os = "hermit")'.dependencies]
 hermit = { version = "=0.11", path = "../../hermit", default-features = false, features = ["acpi", "pci", "fsgsbase", "fs", "tcp", "dhcpv4", "mmap"] }
 hermit-abi = { version = "=0.5", path = "../../hermit-abi", default-features = false }
-wasi = { version = "0.11" }
+wasi = { version = "0.11" }