Adding binutils-or1k to travis build.
Adding binutils-or1k to travis build.

litex-hub/litex-conda-eda,timvideos/conda-hdmi2usb-packages,timvideos/conda-misoc-lm32,timvideos/conda-hdmi2usb-packages,timvideos/conda-misoc-lm32,litex-hub/litex-conda-prog,SymbiFlow/conda-packages,SymbiFlow/conda-packages,litex-hub/litex-conda-compilers