Add a new interceptor for nl_langinfo(3) from NetBSD

Summary:
nl_langinfo - gets locale information.

Add a dedicated test.

Reviewers: vitalybuka, joerg

Reviewed By: vitalybuka

Subscribers: kubamracek, llvm-commits, mgorny, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D55015

llvm-svn: 348369