kern-tools: depend on git-replacement-native

kern-tools: depend on git-replacement-native

Konstantin Aladyshev <aladyshev22@gmail.com> reported that the
kern-tools require git functionality that was introduced in
git versions greater than the minimum project requirements.

In particular:

   commit 923a9de418b3ca8592c3 [kgit-s2q: don't run verication hooks]

uses the --no-verify flag to prevent local git hooks from
running and breaking patching or introducing security
issues from the host configuration.

To ensure that we have a new enough git available for the tools,
we update our DEPENDS to git-native-replacement, and the version
available in oe-core will be built and used instead of the
host provided version.

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>