Mark Beijing as security not supported

According to our Vulnerability Management Procedure currently we
support only master branch and the latest release.

Let's make our users fully aware of that by adding a suitable note to
our security release notes.

Issue-ID: SECCOM-216
Change-Id: I444d8e813745d7c0ece8e4417ee7ac45a2ea6549
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
1 file changed