Add libstd support to Rust BPF (#5788)

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

@@ -1,6 +1,2 @@
-[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" }
+[target.bpfel-unknown-unknown.dependencies.std]
+features = []

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

@@ -1,7 +1,5 @@
 //! @brief Solana Rust-based BPF program utility functions and types
 
-#![no_std]
-
 extern crate solana_sdk_bpf_utils;
 
 pub fn uadd(x: u128, y: u128) -> u128 {