Add "cargo fmt" check to CI

Signed-off-by: Matt Johnston <[email protected]>

Author: mkj

ci/runtests.sh

@@ -6,6 +6,7 @@ set -e
 export CARGO_TARGET_DIR=target/ci
 
 rustup target add thumbv7em-none-eabihf
+rustup component add rustfmt
 
 export RUSTDOCFLAGS='-D warnings'
 export RUSTFLAGS="-D warnings"
@@ -32,4 +33,6 @@ cargo build --features log
 
 cargo doc --features mctp-estack/log
 
+cargo fmt -- --check
+
 echo success