Run tests with race flag and CGO_ENABLED=1

- CGO_ENABLED is required by the race detection. Even though CGO_ENABLED
  seems to hang around after ginkgo is run, the resultant binary still
  seems to run fine.

[#101623472]

Signed-off-by: Evan Short <eshort@pivotal.io>

scripts/test

@@ -1,7 +1,7 @@
 #!/bin/bash
 # vim: set ft=sh
 
-set -e
+set -eu
 
 export GOPATH=$PWD/gopath
 export PATH=$GOPATH/bin:$PATH
@@ -13,6 +13,6 @@ export PATH=${PWD}/Godeps/_workspace/bin:$PATH
 
 go install github.com/onsi/ginkgo/ginkgo
 
-ginkgo -r -p "$@"
+CGO_ENABLED=1 ginkgo -race -r -p "$@"
 
 ./scripts/build