`.lef` file improvements.

 * Fixing missing VNB / VPB pins in `.lef` files.
 * Removing `UNITS` section.

Updating sky130_fd_sc_hdll 0.1.1.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>
tree: 83e5fa2f384298413814e0d55547ff358b414348
  1. cells/
  2. models/
  3. tech/
  4. timing/
  5. .gitignore
  6. LICENSE
  7. README.rst