#if order consistency
VC-specific memory management code should only be applied under VC
Recover `zonf.h` and fix #106

From:

* https://github.com/numenta/nupic/blob/46835bfdf53b4b2d12f88ed1fd0dd02f33bf22aa/external/common/include/zconf.h
* https://github.com/numenta/nupic/blob/46835bfdf5/external%2Flinux32arm%2Finclude%2Fzconf.h
* https://github.com/numenta/nupic/blob/46835bfdf5/external%2Flinux32armv7%2Finclude%2Fzconf.h