Add Dropout to blacklist (#25881)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25881
Add Dropout to blacklist to avoid the error in eager mode quantization.
ghstack-source-id: 89759536
Test Plan: Test locally in python notebook.
Reviewed By: jianyuh
Differential Revision: D17270826
fbshipit-source-id: bcf43483976740564d7f407838f25c2dbb67b016
