Fix package path in container

Use self directory name.

Author: at-wat

ci/.travis.yml

@@ -68,10 +68,10 @@ test_i386_job: &test_i386_job
         -u $(id -u):$(id -g) \
         -e "GO111MODULE=on" \
         -e "CGO_ENABLED=0" \
-        -v $PWD:/go/src/github.com/pion/webrtc \
-        -v $HOME/gopath/pkg/mod:/go/pkg/mod \
-        -v $HOME/.cache/go-build:/.cache/go-build \
-        -w /go/src/github.com/pion/webrtc \
+        -v ${PWD}:/go/src/github.com/pion/$(basename ${PWD}) \
+        -v ${HOME}/gopath/pkg/mod:/go/pkg/mod \
+        -v ${HOME}/.cache/go-build:/.cache/go-build \
+        -w /go/src/github.com/pion/$(basename ${PWD}) \
         -it go-tester \
         /usr/local/go/bin/go test \
           -tags quic \