Fix installing from source

Due to recent build changes, --release no longer applies the right
optimization settings, and --profile firmware has to be used.

doc/installing-from-source.md

@@ -35,9 +35,9 @@ rustup target add x86_64-pc-windows-gnu
 Now you can root your device and install Rayhunter by running:
 
 ```sh
-cargo build --bin rayhunter-daemon --target armv7-unknown-linux-musleabihf --release --no-default-features --features orbic
+cargo build --bin rayhunter-daemon --target armv7-unknown-linux-musleabihf --profile firmware --no-default-features --features orbic
 
-cargo build --bin rootshell --target armv7-unknown-linux-musleabihf --release
+cargo build --bin rootshell --target armv7-unknown-linux-musleabihf --profile firmware
 
 cargo run --bin installer orbic
 ```

installer/build.rs

@@ -6,7 +6,7 @@ fn main() {
     println!("cargo::rerun-if-env-changed=NO_FIRMWARE_BIN");
     let include_dir = Path::new(concat!(
         env!("CARGO_MANIFEST_DIR"),
-        "/../target/armv7-unknown-linux-musleabihf/release/"
+        "/../target/armv7-unknown-linux-musleabihf/firmware/"
     ));
     set_binary_var(&include_dir, "FILE_ROOTSHELL", "rootshell");
     set_binary_var(

installer/src/orbic.rs

@@ -1,5 +1,5 @@
 use std::io::{ErrorKind, Write};
-use std::path::{Path, Prefix};
+use std::path::Path;
 use std::time::Duration;
 
 use adb_client::{ADBDeviceExt, ADBUSBDevice, RustADBError};