Add debug prints to inspect repository_ctx.os.environ in local_python_configure

Author: vkarampudi

third_party/python_configure.bzl

@@ -205,6 +205,8 @@ def _raw_exec(repository_ctx, cmdline):
     Returns:
       The 'exec_result' of repository_ctx.execute().
     """
+    print("DEBUG: _raw_exec environment keys: %s" % repository_ctx.os.environ.keys())
+    print("DEBUG: _raw_exec PYTHONPATH: %s" % repository_ctx.os.environ.get("PYTHONPATH"))
     env = {}
     for k in ["PYTHONPATH", "PYTHON_BIN_PATH", "PYTHON_LIB_PATH"]:
         if k in repository_ctx.os.environ: