attempt to fix node less than 16 which contains older node-gyp before…

… 0.6.0 release - refs nodejs/node-gyp#2233

test/app4/binding.gyp

@@ -15,7 +15,13 @@
       },
       'msvs_settings': {
         'VCCLCompilerTool': { 'ExceptionHandling': 1 },
-      }
+      },
+      # gyp inside node v16 uses -rpath=$ORIGIN/ instead of -rpath=$ORIGIN/lib.target/
+      # which fixes a longstanding descreptancy between platforms as documented at https://github.com/nodejs/node-gyp/issues/2233
+      # This allows tests to pass for older, still buggy and inconsistent versions of node-gyp (and will be duplicative for npm >= 7 which bundles node-gyp >= v0.6.0)
+      'ldflags': [
+        "-Wl,-rpath=\$$ORIGIN/"
+      ],
     },
     {
       "target_name": "action_after_build",