patch ensurepip: replace platform.libc_ver with stub

Author: cosminbasca

graalpython/lib-python/3/ensurepip/__init__.py

@@ -23,6 +23,14 @@ def _run_pip(args, additional_paths=None):
     if additional_paths is not None:
         sys.path = additional_paths + sys.path
 
+    # Truffle patch: begin
+    import platform
+
+    def libc_ver(executable=sys.executable, lib='', version='', chunksize=16384):
+        return lib, None
+    setattr(platform, 'libc_ver', libc_ver)
+    # End Truffle patch
+
     # Install the bundled software
     import pip._internal
     return pip._internal.main(args)