Add .eggs/* to .gitignore

After running:

  python setup.py build_sphinx

there is a .eggs directory left in the repo root directory
which is not currently ignored by git.

Change-Id: Id15811f94046fd8bb22153425bf5cafe6c045453

Author: Alistair Coles

.gitignore

@@ -9,6 +9,7 @@ ChangeLog
 .coverage
 *.egg
 *.egg-info
+.eggs/*
 .DS_Store
 .tox
 pycscope.*