rust: Add support for host fuzzers.

Adds support for host-based Rust fuzzers.

Bug: 282897366
Test: SANITZE_HOST="address" m <host_fuzzer>
Test: run fuzzer
Change-Id: Ibb951f651ef12e763778ebbf12e66769a7113920
diff --git a/rust/testing.go b/rust/testing.go
index 7f30569..3fe751e 100644
--- a/rust/testing.go
+++ b/rust/testing.go
@@ -182,6 +182,7 @@
 	ctx.RegisterModuleType("rust_library_host_dylib", RustLibraryDylibHostFactory)
 	ctx.RegisterModuleType("rust_library_host_rlib", RustLibraryRlibHostFactory)
 	ctx.RegisterModuleType("rust_fuzz", RustFuzzFactory)
+	ctx.RegisterModuleType("rust_fuzz_host", RustFuzzHostFactory)
 	ctx.RegisterModuleType("rust_ffi", RustFFIFactory)
 	ctx.RegisterModuleType("rust_ffi_shared", RustFFISharedFactory)
 	ctx.RegisterModuleType("rust_ffi_static", RustFFIStaticFactory)