mk is so tiny now, and will likely never get
bigger. tree.sh is effectively the main script
now, so let's treat it as such.

i'll start splitting tree.sh instead. e.g.
move gcc setup to its own file.

Signed-off-by: Leah Rowe <leah@libreboot.org>

this solves a bug that does not yet manifest, because
this bug *can't* currently trigger any error due to
lbmk's design. this is therefore a preventative fix,
for reasons that will become clear.

we previously put arguments in a variable, in a way
that didn't handle globbing. now we avoid a variable
and use "$@" instead, which solves the problem.

this also means that the main logic in mk can be
cleaner, as trees-specific control logic is now
placed entirely in tree.sh's main.

this means that we can now also wrap x_ around trees()

this was never a problem in the past, because all of
the arguments for trees commands never have globbing;
config names are always e.g. foo_bar, not foo bar

in commands where globbing did need to be handled,
those commands were never trees commands. e.g.
you had ./mk inject filename

yes, this is a design improvement, or a preventative
bug fix. pick your poison.

Signed-off-by: Leah Rowe <leah@libreboot.org>

Signed-off-by: Leah Rowe <leah@libreboot.org>