don't install symlinks to shared libraries

Index: SCons/Tool/install.py
--- SCons/Tool/install.py.orig
+++ SCons/Tool/install.py
@@ -30,6 +30,7 @@ selection method.
 
 import os
 import stat
+import sys
 from shutil import copy2, copystat
 
 import SCons.Action
@@ -210,6 +211,9 @@ def copyFuncVersionedLib(dest, source, env) -> int:
     return 0
 
 def listShlibLinksToInstall(dest, source, env):
+    if sys.platform.startswith('openbsd'):
+        return []
+
     install_links = []
     source = env.arg2nodes(source)
     dest = env.fs.File(dest)