kernel-devsrc.bbappend: Use ${bindir}/env awk
kernel-devsrc.bbappend: Use ${bindir}/env awk

Use ${bindir}/env awk instead of /bin/awk in kernel tools and
scripts. This fixes kernel-devsrc package installation failures
because awk is typically not installed in /bin.

References:
https://gerrit.automotivelinux.org/gerrit/gitweb?p=AGL/meta-agl.git;a=commit;h=4bfc821810cdee47611c6d3e94d771971f51fa75
https://lists.yoctoproject.org/pipermail/meta-intel/2017-January/004519.html
https://patchwork.openembedded.org/patch/136699/
http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-cache/commit/?h=yocto-4.9&id=d0e0a36eec57f5dfa02045776c69092c145f5000

Also included some workarounds to enable building kernel-devsrc
with the very old kernel in L4T R21.x for the TK1.

(#139)

Signed-off-by: Leon Anavi <15d13d7e2c6115f28df053122512bfcb5eb2dbf7@konsulko.com>
Signed-off-by: Matt Madison <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@madison.systems>

madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra