Add new NetBSD interceptors: devname(3), devname_r(3)

Summary:
devname, devname_r - get device name

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, vitalybuka

Reviewed By: vitalybuka

Subscribers: kubamracek, llvm-commits, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D42053

llvm-svn: 324120