Fix syntax for Windows userland builds.
Fix syntax for Windows userland builds.

deepak899/sctp-refimpl,xwhuang/sctp-refimpl,xwhuang/sctp-refimpl,xwhuang/sctp-refimpl,sctplab/sctp-refimpl,xwhuang/sctp-refimpl,deepak899/sctp-refimpl,sctplab/sctp-refimpl,sctplab/sctp-refimpl,deepak899/sctp-refimpl,deepak899/sctp-refimpl,sctplab/sctp-refimpl,deepak899/sctp-refimpl,sctplab/sctp-refimpl,sctplab/sctp-refimpl,xwhuang/sctp-refimpl,xwhuang/sctp-refimpl,deepak899/sctp-refimpl