Port msan_test.cc to NetBSD
Port msan_test.cc to NetBSD

Summary:
The changes allows building this file on NetBSD, mostly by
disabling the unsupported functions and adding OS-specific
system includes.

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, kcc, vitalybuka

Reviewed By: vitalybuka

Subscribers: llvm-commits, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D46712

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@332791 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt