Add 128bit Rust BPF test (#4766)

automerge

programs/bpf/rust/128bit_dep/.gitignore

@@ -0,0 +1,3 @@
+/target/
+
+Cargo.lock

programs/bpf/rust/128bit_dep/Cargo.toml

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+
+# Note: This crate must be built using build.sh
+
+[package]
+name = "solana-bpf-rust-128bit-dep"
+version = "0.16.0"
+description = "Solana BPF many-args-dep program written in Rust"
+authors = ["Solana Maintainers <maintainers@solana.com>"]
+repository = "https://github.com/solana-labs/solana"
+license = "Apache-2.0"
+homepage = "https://solana.com/"
+edition = "2018"
+
+[dependencies]
+solana-sdk-bpf-utils = { path = "../../../../sdk/bpf/rust/rust-utils", version = "0.16.0" }
+
+[workspace]
+members = []
+

programs/bpf/rust/128bit_dep/Xargo.toml

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+[dependencies.compiler_builtins]
+path = "../../../../sdk/bpf/dependencies/rust-bpf-sysroot/src/compiler-builtins"
+features = ["c", "mem"]
+
+[target.bpfel-unknown-unknown.dependencies]
+alloc = { path = "../../../../sdk/bpf/dependencies/rust-bpf-sysroot/src/liballoc" }

programs/bpf/rust/128bit_dep/src/lib.rs

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+//! @brief Solana Rust-based BPF program utility functions and types
+
+#![no_std]
+
+extern crate solana_sdk_bpf_utils;
+
+pub fn work(x: u128, y: u128) -> u128 {
+    x + y
+}