Add Travis configuration

Travis allows us to test rusty-hermit on uhyve

.travis.yml

@@ -0,0 +1,35 @@
+language: rust
+rust:
+  - nightly
+os: linux
+dist: bionic
+cache: cargo
+before_cache:
+  # Only cache cargo dependencies, do a clean build for rusty-hermit
+  - rm -rf $TRAVIS_BUILD_DIR/target
+before_install:
+  - sudo apt-get install -y qemu-kvm libvirt-daemon-system libvirt-clients bridge-utils
+  - sudo adduser $USER libvirt
+  - sudo adduser $USER kvm
+  - rustup component add rust-src
+  - rustup component add llvm-tools-preview
+  - cargo install uhyve
+  - >
+    if [ $(egrep -c '(vmx|svm)' /proc/cpuinfo) -eq "0" ]; then
+        echo "No virtualization possible - uhyve can't run";
+        exit -1;
+    fi
+jobs:
+  include:
+    - name: "Test Debug Build"
+      script:
+        - cargo build -Z build-std=std,core,alloc,panic_abort --target x86_64-unknown-hermit
+        # used to get terminal with new groups permissions while preserving own user
+        - sudo -E sudo -u $USER -E bash -c "HERMIT_VERBOSE=1 $HOME/.cargo/bin/uhyve target/x86_64-unknown-hermit/debug/rusty_demo"
+        - sudo -E sudo -u $USER -E bash -c "HERMIT_VERBOSE=1 HERMIT_CPUS=2 $HOME/.cargo/bin/uhyve target/x86_64-unknown-hermit/debug/rusty_demo"
+    - name: "Test Release Build"
+      script:
+        - cargo build -Z build-std=std,core,alloc,panic_abort --target x86_64-unknown-hermit --release
+        - sudo -E sudo -u $USER -E bash -c "HERMIT_VERBOSE=1 $HOME/.cargo/bin/uhyve target/x86_64-unknown-hermit/release/rusty_demo"
+        - sudo -E sudo -u $USER -E bash -c "HERMIT_VERBOSE=1 HERMIT_CPUS=2 $HOME/.cargo/bin/uhyve target/x86_64-unknown-hermit/release/rusty_demo"
+