build: add TravisCI configuration for drive repo.

Change-Id: Idcaaa9c117ba265e894fb99478b54c0e906b870f
Reviewed-on: https://upspin-review.googlesource.com/16540
Reviewed-by: Andrew Gerrand <adg@golang.org>
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..90ed624
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,8 @@
+language: go
+go:
+- 1.9.x
+go_import_path: drive.upspin.io
+script: go test -short -race ./...
+notifications:
+  email:
+  - upspin-reviews@googlegroups.com