Install swig on linux ci
Closes previously there was an error in the logs about `swig` not existing
@@ -42,7 +42,7 @@ jobs:
- stage: SimTests
python: 3.7
before_install: &travis_linx_prep
- - sudo apt-get install gperf
+ - sudo apt-get -y install gperf swig
- if [[ ! -e "./iverilog/README.txt" ]]; then rm -rf iverilog; git clone https://github.com/steveicarus/iverilog.git --depth=1 --branch v10_2; fi
- cd iverilog && autoconf && ./configure && make -j2 && sudo make install && cd ..
- pip install tox
