Update MANIFEST.in

Author: varun-r-mallya

MANIFEST.in

@@ -1,8 +1,13 @@
 include README.md LICENSE pybind11/LICENSE
 graft pybind11/include
 graft pybind11/tools
+include LICENSE
 recursive-include src *.cpp *.h
-recursive-include libbpf/src *.c *.h Makefile
+recursive-include libbpf/src *.c *.h *.map Makefile
 recursive-include libbpf/include *.h
+include libbpf/README.md
+include libbpf/LICENSE
+include libbpf/LICENSE.BSD-2-Clause
+include libbpf/LICENSE.LGPL-2.1
 graft src
 global-include CMakeLists.txt *.cmake