Enable BPF shared objects (#2012)

* Switch to BPF ELF shared objects (.so)

programs/native/bpf_loader/Cargo.toml

@@ -16,7 +16,7 @@ elf = "0.0.10"
 env_logger = "0.6.0"
 libc = "0.2.44"
 log = "0.4.2"
-solana_rbpf = "=0.1.4"
+solana_rbpf = "=0.1.5"
 serde = "1.0.27"
 solana-sdk = { path = "../../../sdk", version = "0.11.0" }
 

programs/native/bpf_loader/benches/bpf_loader.rs

@@ -16,7 +16,7 @@ use std::path::PathBuf;
 use test::Bencher;
 
 /// BPF program file extension
-const PLATFORM_FILE_EXTENSION_BPF: &str = "o";
+const PLATFORM_FILE_EXTENSION_BPF: &str = "so";
 /// Create a BPF program file name
 fn create_bpf_path(name: &str) -> PathBuf {
     let mut pathbuf = {