travis: install target

.travis.yml

@@ -1,4 +1,5 @@
 language: rust
+
 matrix:
   include:
     - rust: nightly
@@ -8,4 +9,10 @@ matrix:
     - rust: nightly
       env: FEATURES='bkpt'
 script:
-  - "cargo build --target=thumbv7em-none-eabihf --no-default-features --features \"$FEATURES\""
+  - "cargo build --target thumbv7em-none-eabihf --features \"$FEATURES\" $ARGS"
+
+install:
+  - rustup target add thumbv7em-none-eabihf
+
+notifications:
+  email: false