Purge generated stub libraries.

I'd removed these manually from the r13 install, but they came back
with r16. Remove them from git manually one more time so update.py
only needs to remove them from the file system rather than from git.

Test: make checkbuild
Bug: None
Change-Id: I792113ff51cb763cacfbf2784ccd7f76f672f0ce
858 files changed