Support make test WHAT=.....

Signed-off-by: Andy Goldstein <goldsteina@vmware.com>

hack/test.sh

@@ -20,8 +20,20 @@ set -o pipefail
 
 export CGO_ENABLED=0
 
-TARGETS=$(for d in "$@"; do echo ./$d/...; done)
+TARGETS=(
+  ./cmd/...
+  ./pkg/...
+)
 
-echo "Running tests:"
-go test -installsuffix "static" -timeout 60s ${TARGETS}
+if [[ ${#@} -ne 0 ]]; then
+  TARGETS=("$@")
+fi
+
+echo "Running tests:" "${TARGETS[@]}"
+
+if [[ -n "${GOFLAGS:-}" ]]; then
+  echo "GOFLAGS: ${GOFLAGS}"
+fi
+
+go test -installsuffix "static" -timeout 60s "${TARGETS[@]}"
 echo "Success!"