busybox

1) ifeq is make syntax, #ifeq is a make comment.
2) The check_cc macros should probably all have the same number of arguments.
3) Move the -Werror into the gcc 4.0 on i386 test, because gcc 4.1 is broken
and produces warnings for things that provably aren't incorrect.

In other news it would be nice if our check_ld macro actually did something,
and why does or makefile do all the check_cc calls, then call itself as if
it's building out of tree, then do all the check_cc calls again?