kern-tools: bug fixes and kgit-gconfig

Bumping yocto-kernel-tools to version v0.3, which comprises the following commits:

    90598a5 tools: Makefile: add missing install file
    330f9fa kgit-config: fix file mode
    22b55cd kgit-config: cleanup error message
    1e2a233 kgit-config: fix the "not found" message
    e7fcb9a kgit-config: trim trailing whitespace
    3cd14ce kgit-config: BSP template and auto meta-data creation
    e56620c tools: introduce kgit-config
    969b888 buckets: update to v5.14+
    d220b06 Kconfiglib: add support for bare 'modules' keyword

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