[ovs-git] [openvswitch/ovs] e92cfb: travis: Drop -MD related workaround for sparse.

[Ilya Maximets]

  Branch: refs/heads/branch-2.12
  Home:   https://github.com/openvswitch/ovs
  Commit: e92cfbf246df1b0cd48e17de75edcb724efe5620
      https://github.com/openvswitch/ovs/commit/e92cfbf246df1b0cd48e17de75edcb724efe5620
  Author: Ilya Maximets <i.maximets at ovn.org>
  Date:   2019-09-26 (Thu, 26 Sep 2019)

  Changed paths:
    M .travis/linux-prepare.sh

  Log Message:
  -----------
  travis: Drop -MD related workaround for sparse.

The issue was fixed in upstream sparse by the following commit:
d90c0838c101 ("cgcc: fix wrong processing of -MD & -MMD")

This patch is required to fix our travis build.

Signed-off-by: Ilya Maximets <i.maximets at ovn.org>
Acked-by: Ian Stokes <ian.stokes at intel.com>