Fix the version history: changes going into 1.1.0 that are also going

into 1.0.1 should not be listed as "changes between 1.0.1 and 1.0.0".

This makes the OpenSSL_1_0_1-stable and HEAD versions of this file
consistent with each other (the HEAD version has the additional 1.1.0
section, but doesn't otherwise differ).