Fix macOS rpath

Author: auxten

Diff for: binding.gyp

@@ -11,6 +11,13 @@
         "."
       ],
       "libraries": [ "<(module_root_dir)/libchdb.so" ],
+      "conditions": [
+        ['OS=="mac"', {
+          "ldflags": [
+            "-Wl,-rpath,@loader_path/../../"
+          ]
+        }]
+      ],
       "cflags!": [ "-fno-exceptions" ],
       "cflags_cc!": [ "-fno-exceptions" ],
       "defines": [ "NAPI_DISABLE_CPP_EXCEPTIONS" ]