Add dependent crate test (#4647)

automerge

programs/bpf/rust/dep_crate/src/lib.rs

@@ -0,0 +1,22 @@
+//! @brief Example Rust-based BPF program tests dependent crates
+
+#![no_std]
+
+extern crate solana_sdk_bpf_utils;
+
+use byteorder::{ByteOrder, LittleEndian};
+use solana_sdk_bpf_utils::log::*;
+
+#[no_mangle]
+pub extern "C" fn entrypoint(_input: *mut u8) -> bool {
+    let mut buf = [0; 4];
+    LittleEndian::write_u32(&mut buf, 1_000_000);
+    assert_eq!(1_000_000, LittleEndian::read_u32(&buf));
+
+    let mut buf = [0; 2];
+    LittleEndian::write_i16(&mut buf, -5_000);
+    assert_eq!(-5_000, LittleEndian::read_i16(&buf));
+
+    sol_log("Success");
+    true
+}