Use explicit dyn in build scripts

Author: austinbes

ci/asm/rt/build.rs

@@ -2,7 +2,7 @@ use std::{env, error::Error, fs::File, io::Write, path::PathBuf};
 
 use cc::Build;
 
-fn main() -> Result<(), Box<Error>> {
+fn main() -> Result<(), Box<dyn Error>> {
     // build directory for this crate
     let out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
 

ci/asm/rt2/build.rs

@@ -6,7 +6,7 @@ use std::{
     path::PathBuf,
 };
 
-fn main() -> Result<(), Box<Error>> {
+fn main() -> Result<(), Box<dyn Error>> {
     // build directory for this crate
     let out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
 

ci/logging/log/build.rs

@@ -1,6 +1,6 @@
 use std::{env, error::Error, fs::File, io::Write, path::PathBuf};
 
-fn main() -> Result<(), Box<Error>> {
+fn main() -> Result<(), Box<dyn Error>> {
     // Put the linker script somewhere the linker can find it
     let out = PathBuf::from(env::var("OUT_DIR")?);
 

ci/main/rt/build.rs

@@ -1,6 +1,6 @@
 use std::{env, error::Error, fs::File, io::Write, path::PathBuf};
 
-fn main() -> Result<(), Box<Error>> {
+fn main() -> Result<(), Box<dyn Error>> {
     // build directory for this crate
     let out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());