Attempt to improve CI caching.

Author: bheisler

.travis.yml

@@ -35,6 +35,17 @@ env:
     - CUDA_LIBRARY_PATH=/usr/local/cuda-8.0/targets/x86_64-linux/lib:/usr/local/cuda-8.0/targets/x86_64-linux/lib/stubs
     - secure: 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
 
+before_cache:
+- find ./target/debug -maxdepth 1 -type f -delete
+- rm -rf ./target/debug/deps/rustacuda*
+- rm -rf ./target/debug/deps/test*
+- rm -rf ./target/debug/deps/launch*
+- rm -rf ./target/debug/.fingerprint/rustacuda*
+- rm -rf ./target/debug/.fingerprint/test*
+- rm -rf ./target/debug/.fingerprint/launch*
+- rm -f  ./target/.rustc_info.json
+- rm -rf ./target/criterion
+
 branches:
   only: master