travis: use use-local for conda install

fallen · fallen · commit 4509265c70b9 · 2015-06-30T00:42:56.000+02:00
http://conda.pydata.org/docs/build_tutorials/pkgs.html
diff --git a/.travis.yml b/.travis.yml
@@ -26,7 +26,7 @@ install:
   - "verilator --version; true"
   # Build and install Migen conda package
   - "conda build conda/migen"
-  - "conda install $HOME/miniconda/conda-bld/linux-64/migen-*.tar.bz2"
+  - "conda install migen --use-local"
 
 script:
   # Run tests
