Added MESOS-7042 and MESOS-9324 to the 1.7.1 CHANGELOG.

CHANGELOG

@@ -17,6 +17,7 @@ Release Notes - Mesos - Version 1.7.1
     IDs and resource provider IDs (see MESOS-9293).
 
 ** Bug
+  * [MESOS-7042] - Send SIGKILL after SIGTERM to IOSwitchboard after container termination.
   * [MESOS-7474] - Mesos fetcher cache doesn't retry when missed.
   * [MESOS-8545] - AgentAPIStreamingTest.AttachInputToNestedContainerSession is flaky.
   * [MESOS-8907] - Docker image fetcher fails with HTTP/2.
@@ -37,6 +38,7 @@ Release Notes - Mesos - Version 1.7.1
   * [MESOS-9295] - Nested container launch could fail if the agent upgrade with new cgroup subsystems.
   * [MESOS-9308] - URI disk profile adaptor could deadlock.
   * [MESOS-9317] - Some master endpoints do not handle failed authorization properly.
+  * [MESOS-9324] - Resource fragmentation: frameworks may be starved of port resources in the presence of large number frameworks with quota.
   * [MESOS-9332] - Nested container should run as the same user of its parent container by default.
   * [MESOS-9334] - Container stuck at ISOLATING state due to libevent poll never returns.
   * [MESOS-9362] - Test `CgroupsIsolatorTest.ROOT_CGROUPS_CreateRecursively` is flaky.
@@ -54,7 +56,7 @@ Release Notes - Mesos - Version 1.7.1
   * [MESOS-9518] - CNI_NETNS should not be set for orphan containers that do not have network namespace.
   * [MESOS-9519] - Unable to build Mesos with CMake on Ubuntu 14.04.
 
-** Improvement:
+** Improvement
   * [MESOS-6765] - Make the Resources wrapper "copy-on-write" to improve performance.
   * [MESOS-9239] - Improve sorting performance in the DRF sorter.
   * [MESOS-9249] - Avoid dirtying the DRF sorter when allocating resources.