Package pybind11/eigen/ (pytorch#113055) (pytorch#114756)

Which was added for eigen 2.11 release, see https://github.com/pybind/pybind11/tree/v2.11.0/include/pybind11/eigen

Fixes pytorch#112841

Cherry-pick of  pytorch#113055 into release/2.1 branch

Co-authored-by: Nikita Shulga <[email protected]>

Author: atalman

setup.py

@@ -1323,6 +1323,7 @@ def main():
         "include/torch/csrc/lazy/ts_backend/*.h",
         "include/pybind11/*.h",
         "include/pybind11/detail/*.h",
+        "include/pybind11/eigen/*.h",
         "include/TH/*.h*",
         "include/TH/generic/*.h*",
         "include/THC/*.cuh",