move clmul files from nmutil.git
https://git.libre-soc.org/?p=nmutil.git;a=commit;h=
2ef87c06d25b692ede35aa6340a108ba410b440a
nmutil.git/src/nmutil/clmul.py => src/nmigen_gf/hdl/clmul.py
nmutil.git/src/nmutil/test/test_clmul.py => src/nmigen_gf/hdl/test/test_clmul.py
Revert "temporarily remove COPYING.LGPLv3"
This reverts commit
af05a233a7c72a42287b4f267d1a5bc3c8a76603.
Move files from libreriscv.git/openpower/sv/bitmanip/
https://git.libre-soc.org/?p=libreriscv.git;a=tree;f=openpower/sv/bitmanip;hb=
633d57457d98b8c6ab7803fe72050f8918bba87f