Travis-CI: Use individual script steps, to allow collapsing them in the log

.travis.yml

@@ -29,11 +29,8 @@ addons:
 
 cache: ccache
 
-script: |
-  wget -O - http://nginx.org/download/nginx-${NGINX}.tar.gz | tar -xzf -
-  rm -rf prefix/
-  cd nginx-${NGINX}
-  ./configure --add-${DYNAMIC:+dynamic-}module=.. --with-http_addition_module --prefix="$(pwd)/../prefix"
-  make install
-  cd ..
-  ./t/run "$(pwd)/prefix" ${DYNAMIC}
+script:
+  - wget -O - http://nginx.org/download/nginx-${NGINX}.tar.gz | tar -xzf -
+  - rm -rf prefix/
+  - ( cd nginx-${NGINX} && ./configure --add-${DYNAMIC:+dynamic-}module=.. --with-http_addition_module --prefix="$(pwd)/../prefix" && make install )
+  - ./t/run "$(pwd)/prefix" ${DYNAMIC}