Add NetBSD support in sanitizer_libignore.cc

Summary:
Reuse Linux, FreeBSD and Apple code - no NetBSD specific changes.

Part of the code inspired by the original work on libsanitizer in GCC 5.4 by Christos Zoulas.
    
Sponsored by <The NetBSD Foundation>

Reviewers: joerg, vitalybuka, filcab, kcc

Reviewed By: filcab

Subscribers: emaste, kubamracek, llvm-commits

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D35628

llvm-svn: 308616

compiler-rt/lib/sanitizer_common/sanitizer_libignore.cc

@@ -9,7 +9,7 @@
 
 #include "sanitizer_platform.h"
 
-#if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_MAC
+#if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_MAC || SANITIZER_NETBSD
 
 #include "sanitizer_libignore.h"
 #include "sanitizer_flags.h"
@@ -125,4 +125,4 @@ void LibIgnore::OnLibraryUnloaded() {
 
 } // namespace __sanitizer
 
-#endif // #if SANITIZER_FREEBSD || SANITIZER_LINUX
+#endif // #if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_MAC || SANITIZER_NETBSD