retry package version

.travis.yml

@@ -25,7 +25,7 @@ matrix:
 before_install:
   - sudo add-apt-repository ppa:asolovets/backports -y
   - sudo apt-get update -qq
-  - if [ "$BINDINGS" != "none" ]; then sudo apt-get install -qq swig=2.0.10-0ubuntu2; swig -version; fi
+  - if [ "$BINDINGS" != "none" ]; then sudo apt-get install -qq swig=2.0.10-0; swig -version; fi
   - if [ "$BINDINGS" == "python" ]; then sudo apt-get install -qq python-dev; fi
 
 install: true