build: fix shared installing target

PR-URL: https://github.com/nodejs/node/pull/15148
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>

tools/install.py

@@ -133,7 +133,10 @@ def files(action):
       if sys.platform != 'darwin':
         output_prefix += 'lib.target/'
 
-  action([output_prefix + output_file], 'bin/' + output_file)
+  if 'false' == variables.get('node_shared'):
+    action([output_prefix + output_file], 'bin/' + output_file)
+  else:
+    action([output_prefix + output_file], 'lib/' + output_file)
 
   if 'true' == variables.get('node_use_dtrace'):
     action(['out/Release/node.d'], 'lib/dtrace/node.d')