option modules on non MODULES

[yamt]

nuttx uses a different symbol.
https://github.com/apache/incubator-nuttx/blob/0c28fe9831ba6766dee9f3fd647147f2e2b8b60f/Kconfig#L216-L218
i guess it's simpler to implement it in Kconfiglib as suggested in

Kconfiglib/kconfiglib.py

Lines 3246 to 3254 in 061e71f

	self._warn("the 'modules' option is not supported. "
	"Let me know if this is a problem for you, "
	"as it wouldn't be that hard to implement. "
	"Note that modules are supported -- "
	"Kconfiglib just assumes the symbol name "
	"MODULES, like older versions of the C "
	"implementation did when 'option modules' "
	"wasn't used.",
	self.filename, self.linenr)

[btashton]

Any thoughts on adding this, it would be helpful for my usage of NuttX as well? I am not familiar with this code base, but I could help if there is upstream interest.