Fix build for multiple GOPATHs

The build script doesn't work when people have GOPATH like
/path/a:/path/b

Signed-off-by: Yongkun Anfernee Gui <agui@vmware.com>

hack/test-cri.sh

@@ -24,11 +24,15 @@ FOCUS=${FOCUS:-}
 SKIP=${SKIP:-""}
 REPORT_DIR=${REPORT_DIR:-"/tmp/test-cri"}
 
+# Check GOPATH
 if [[ -z "${GOPATH}" ]]; then
   echo "GOPATH is not set"
   exit 1
 fi
 
+# For multiple GOPATHs, keep the first one only
+GOPATH=${GOPATH%%:*}
+
 CRITEST=${GOPATH}/bin/critest
 CRITEST_PKG=github.com/kubernetes-incubator/cri-tools
 CRICONTAINERD_SOCK=/var/run/cri-containerd.sock