Route program_id to program entrypoint

programs/native/noop/src/lib.rs

@@ -2,9 +2,16 @@
 extern crate solana_sdk;
 
 use solana_sdk::account::KeyedAccount;
+use solana_sdk::pubkey::Pubkey;
 
 solana_entrypoint!(entrypoint);
-fn entrypoint(keyed_accounts: &mut [KeyedAccount], data: &[u8], tick_height: u64) -> bool {
+fn entrypoint(
+    program_id: &Pubkey,
+    keyed_accounts: &mut [KeyedAccount],
+    data: &[u8],
+    tick_height: u64,
+) -> bool {
+    println!("noop: program_id: {:?}", program_id);
     println!("noop: keyed_accounts: {:#?}", keyed_accounts);
     println!("noop: data: {:?}", data);
     println!("noop: tick_height: {:?}", tick_height);