qmp/qmptest: add a package comment

Author: mdlayher

qmp/qmptest/qmptest.go

@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// Package qmptest provides types which assist in testing interactions with
+// package qmp.
 package qmptest
 
 import (