Auto merge of #21675 - chansuke:format_libsimpleservo, r=jdm

Format ports/libsimpleservo

<!-- Please describe your changes on the following line: -->
Format `ports/libsimpleservo` with:

`rustfmt ports/libsimpleservo/*.rs`

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [ ] These changes fix part of #21373.
- [x] These changes do not require tests because they format code only.

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ports/libsimpleservo/build.rs

@@ -20,7 +20,8 @@ fn main() {
 
 fn android_main() {
     // Get the NDK path from NDK_HOME env.
-    let ndk_path = env::var_os("ANDROID_NDK").expect("Please set the ANDROID_NDK environment variable");
+    let ndk_path =
+        env::var_os("ANDROID_NDK").expect("Please set the ANDROID_NDK environment variable");
     let ndk_path = Path::new(&ndk_path);
 
     let target = env::var("TARGET").unwrap();
@@ -43,7 +44,11 @@ fn android_main() {
     };
 
     // compiling android_native_app_glue.c
-    let c_file = ndk_path.join("sources").join("android").join("native_app_glue").join("android_native_app_glue.c");
+    let c_file = ndk_path
+        .join("sources")
+        .join("android")
+        .join("native_app_glue")
+        .join("android_native_app_glue.c");
     let sysroot = ndk_path.join("platforms").join(platform).join(arch);
     cc::Build::new()
         .file(c_file)
@@ -53,13 +58,13 @@ fn android_main() {
         .compile("android_native_app_glue");
 
     // Get the output directory.
-    let out_dir = env::var("OUT_DIR").expect("Cargo should have set the OUT_DIR environment variable");
+    let out_dir =
+        env::var("OUT_DIR").expect("Cargo should have set the OUT_DIR environment variable");
 
     println!("cargo:rustc-link-lib=static=android_native_app_glue");
     println!("cargo:rustc-link-search=native={}", out_dir);
     println!("cargo:rustc-link-lib=log");
     println!("cargo:rustc-link-lib=android");
-
 }
 
 fn generate_gl_bindings(target: &str) {