Add honggfuzz.

hfuzz/.gitignore

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+hfuzz_workspace/
+hfuzz_target/

hfuzz/Cargo.toml

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+[package]
+name = "hfuzz"
+version = "0.1.0"
+authors = ["Sergey Pepyakin <s.pepyakin@gmail.com>"]
+
+[dependencies]
+honggfuzz = "0.5"
+wasmi = { path = ".." }
+

hfuzz/src/lib.rs

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+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}

hfuzz/src/main.rs

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+#[macro_use] extern crate honggfuzz;
+
+fn main() {
+    // Here you can parse `std::env::args and 
+    // setup / initialize your project
+
+    // You have full control over the loop but
+    // you're supposed to call `fuzz` ad vitam aeternam
+    loop {
+        // The fuzz macro gives an arbitrary object (see `arbitrary crate`)
+        // to a closure-like block of code.
+        // For performance reasons, it is recommended that you use the native type
+        // `&[u8]` when possible.
+        // Here, this slice will contain a "random" quantity of "random" data.
+        fuzz!(|data: &[u8]| {
+        });
+    }
+
+    
+}
+