Do not link with -ldl in NetBSD/ASan tests

Summary:
The dlopen(3) features on NetBSD are in libc.

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, vitalybuka, kcc

Reviewed By: vitalybuka

Subscribers: kubamracek, llvm-commits, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D46713

llvm-svn: 332790

compiler-rt/test/asan/lit.cfg

@@ -48,8 +48,7 @@ config.substitutions.append(('%env_asan_opts=',
 # Setup source root.
 config.test_source_root = os.path.dirname(__file__)
 
-# There is no libdl on FreeBSD.
-if config.host_os != 'FreeBSD':
+if config.host_os not in ['FreeBSD', 'NetBSD']:
   libdl_flag = "-ldl"
 else:
   libdl_flag = ""