entrypoint: enable building and testing of internal/cutil package

Signed-off-by: John Mulligan <jmulligan@redhat.com>

Makefile

@@ -52,7 +52,14 @@ check:
 
 # Do a quick compile only check of the tests and impliclity the
 # library code as well.
-test-binaries: cephfs.test rados.test rbd.test internal/callbacks.test internal/errutil.test internal/retry.test
+test-binaries: \
+	cephfs.test \
+	internal/callbacks.test \
+	internal/cutil.test \
+	internal/errutil.test \
+	internal/retry.test \
+	rados.test \
+	rbd.test
 test-bins: test-binaries
 
 %.test: % force_go_build

entrypoint.sh

@@ -175,6 +175,7 @@ test_go_ceph() {
     pkgs=(\
         "cephfs" \
         "internal/callbacks" \
+        "internal/cutil" \
         "internal/errutil" \
         "internal/retry" \
         "rados" \