Reformat imports to a consistent style for imports

rustfmt.toml configuration:
  imports_granularity = "One"
  group_imports = "One"

sdk/cargo-build-bpf/src/main.rs

@@ -13,8 +13,7 @@ use {
         fs::{self, File},
         io::{prelude::*, BufReader, BufWriter},
         path::{Path, PathBuf},
-        process::exit,
-        process::{Command, Stdio},
+        process::{exit, Command, Stdio},
         str::FromStr,
     },
     tar::Archive,