Import 'futures-executor' rust crate version 0.3.4

Bug: b/151760391
Test: m crosvm.experimental
Change-Id: Ibc1d910237f83f47a4896aba84707fbaac365c10
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
new file mode 100644
index 0000000..9218972
--- /dev/null
+++ b/Cargo.toml.orig
@@ -0,0 +1,26 @@
+[package]
+name = "futures-executor"
+edition = "2018"
+version = "0.3.4"
+authors = ["Alex Crichton <alex@alexcrichton.com>"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/rust-lang/futures-rs"
+homepage = "https://rust-lang.github.io/futures-rs"
+documentation = "https://docs.rs/futures-executor/0.3.0"
+description = """
+Executors for asynchronous tasks based on the futures-rs library.
+"""
+
+[features]
+default = ["std"]
+std = ["futures-core/std", "futures-task/std", "futures-util/std"]
+thread-pool = ["std", "num_cpus"]
+
+[dependencies]
+futures-core = { path = "../futures-core", version = "0.3.4", default-features = false }
+futures-task = { path = "../futures-task", version = "0.3.4", default-features = false }
+futures-util = { path = "../futures-util", version = "0.3.4", default-features = false }
+num_cpus = { version = "1.8.0", optional = true }
+
+[package.metadata.docs.rs]
+all-features = true