travis environment variable used in deploy script

Author: marcmo

.travis.yml

@@ -8,6 +8,7 @@ before_script:
 script:
 - export CARGO_TARGET_DIR=`pwd`/target
 - cargo test
+- cargo build --release
 after_success:
 - travis-cargo coveralls --no-sudo
 notifications:
@@ -20,7 +21,7 @@ deploy:
   provider: releases
   api_key:
     secure: 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
-  file: target/release/enforcer
+  file: $CARGO_TARGET_DIR/release/enforcer
   on:
     branch: master
     tags: true