Tweak travis config

Author: alexcrichton

.travis.yml

@@ -61,7 +61,7 @@ matrix:
     - env: TARGET=powerpc64-unknown-linux-gnu
     - env: TARGET=powerpc-unknown-linux-gnu
     - env: TARGET=x86_64-pc-windows-gnu
-    - env: TARGET=x86_64-unknown-linux-gnu NO_ADD=1
+    - env: TARGET=x86_64-unknown-linux-gnu
     - env: TARGET=x86_64-unknown-linux-musl
 
     # Cross compile Android targets from linux
@@ -94,9 +94,10 @@ matrix:
     - env: TARGET=wasm32-unknown-unknown
       script: cargo build --target $TARGET
 
+install:
+  - if [ "$TARGET" != "" ]; then rustup target add $TARGET; fi
 # docker cross-compilation targets
 script:
-  - if [ "$NO_ADD" == "" ]; then rustup target add $TARGET; fi
   - cargo generate-lockfile
   - ci/run-docker.sh $TARGET