Signed-off-by: Alejandro Mery <amery@geeks.cl>

Signed-off-by: Alejandro Mery <amery@geeks.cl>

Removed packages that are not needed in a docker image,
linux, syslinux, sudo.
The Image is set to none for now, later we will pack
the rootfs in a tar.xz

${wrappervars// /\n}, but since we echo -e that construct should be ${wrappervars// /\\n}

Note:
at least musl-libc and newer glibc stick to standards and consider
setenv(..., NULL, ...) UB as per
http://pubs.opengroup.org/onlinepubs/9699919799/functions/setenv.html
We choose this fix because it mimics old behaviour of glibc, but the real fix
would be to not call at all setenv with NULL second parameter.
Musl relevant mail thread:
http://www.openwall.com/lists/musl/2015/04/23/1

Note:

This is a cross-repository commit, because this highly glibc specific
config.cache file will be put into package/*/glibc/share/config.cache!

Anyway it is highly unlikely that anyone will use OpenSDE to build a system
for those vintage-style CPU models.

This fixes the case the 'dependency_libs' entry had more than one .la file
without /usr prefix listed.
By using the former simple sed pattern only the first listed path was
corrected.