Test gcc-test with --release as well

.travis.yml

@@ -15,6 +15,7 @@ script:
   - cargo build --verbose
   - cargo test --verbose
   - cargo test --manifest-path gcc-test/Cargo.toml --target $TARGET
+  - cargo test --manifest-path gcc-test/Cargo.toml --target $TARGET --release
   - cargo doc
   - rustdoc --test README.md -L target/debug
 after_success:
@@ -28,7 +29,6 @@ env:
 notifications:
   email:
     on_success: never
-
 os:
   - linux
   - osx

appveyor.yml

@@ -16,3 +16,4 @@ build: false
 test_script:
   - cargo test
   - cargo test --manifest-path gcc-test/Cargo.toml
+  - cargo test --manifest-path gcc-test/Cargo.toml --release