update codecov script in travis-ci build

.travis.yml

@@ -25,6 +25,7 @@ addons:
       - cmake
       - gcc
       - binutils-dev
+      - libiberty-dev
 
 after_success: |
   wget https://github.com/SimonKagstrom/kcov/archive/master.tar.gz &&
@@ -34,9 +35,9 @@ after_success: |
   cd build &&
   cmake .. &&
   make &&
-  sudo make install &&
+  make install DESTDIR=../../kcov-build &&
   cd ../.. &&
   rm -rf kcov-master &&
-  for file in target/debug/genevo-*[^\.d]; do mkdir -p "target/cov/$(basename $file)"; kcov --exclude-pattern=/.cargo,/usr/lib --verify "target/cov/$(basename $file)" "$file"; done &&
+  for file in target/debug/genevo-*[^\.d]; do mkdir -p "target/cov/$(basename $file)"; ./kcov-build/usr/local/bin/kcov --exclude-pattern=/.cargo,/usr/lib --verify "target/cov/$(basename $file)" "$file"; done &&
   bash <(curl -s https://codecov.io/bash) &&
   echo "Uploaded code coverage"