kernel-yocto: streamline patch, configuration and audit phases

We've been running with a set of kern-tools that were designed to work
with build systems that knew nothing about git, trees, commits, etc.

As such, there's been a set of shims/wrappers in place to work with
within bitbake/oe-core. These were the *me scripts: createme, updateme,
patchme and configme.

With this commit, we strip that legacy code and use the tools directly.
This means less complexity, fewer corner cases .. and no surprises
when the tools are arunning. As another benefit, the tools consume
much less time during a typical build and have no noticeable impact
on the overall build time.

Existing .scc files, features, and processing are not impacted as
these tools are compatible with existing feature descriptions and
kerne configuration fragments.

The audit of kernel configuration fragments is now detached
from the linux-yocto build structure and process. This means that
they can eventually be tweaked to offer kernel audit to any type of
kernel build and configuration process.

Additionally, the kernel symbol audit phase can now resolve symbol
dependencies and offer guidance when a symbol is missing:

   WARNING: linux-yocto-4.4.15+gitAUTOINC+b030d96c7b_f5e2c49d58-r0 do_kernel_configcheck: [kernel config]: specified values did not make it into the kernel's final configuration:

   ---------- CONFIG_BT_6LOWPAN -----------------
   Config: CONFIG_BT_6LOWPAN
   From: /home/bruce/poky/build/tmp/work-shared/qemux86-64/kernel-source/.kernel-meta/configs/standard/features/bluetooth/bluetooth.cfg
   Requested value:  CONFIG_BT_6LOWPAN=y
   Actual value:

   Config 'BT_6LOWPAN' has the following conditionals:
     BT_LE && 6LOWPAN (value: "n")
   Dependency values are:
     BT_LE [y] 6LOWPAN [n]

(From OE-Core rev: 0f698dfd1c8bbc0d53ae7977e26685a7a3df52a3)

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

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