LU-11266 build: update changelog for Ubuntu

Record the version that we are building

Test-Parameters: trivial

Change-Id: Ic4ef5e906bffcdebc82a3db44beff0bfd95b4b77
Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/33021


Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: John L. Hammond <jhammond@whamcloud.com>

lustre/ChangeLog

@@ -28,7 +28,7 @@ TBD Whamcloud
          3.12.74-60.64.40    (SLES12 SP1)
          4.4.120-92.70       (SLES12 SP2)
          4.4.133-94.33       (SLES12 SP3)
-         4.4.0-116           (Ubuntu 16.04)
+         4.4.0-131           (Ubuntu 16.04)
          vanilla linux 4.6.7
        * Recommended e2fsprogs version: 1.42.13.wc6 or newer
        * Recommended ZFS / SPL version: 0.7.9