Reverse the expectation in SSO match_different_[member_]struct_names

Reverse the expectation in SSO match_different_[member_]struct_names

The resolution of bug #15866 is that the spec should be changed to
require that "structures have the same name" in order for the types
to match during SSO validation.  These structures differ in name,
so they should not match, and we should get an SSO validation
failure.

Khronos bug #15866
Google bug: 33457655

Change-Id: Ie1f6bdb625661f0ed4585dfde7a0694f32ff3413
(cherry picked from commit bcd52533b14b0772dab895d6d449a02c0c34e043)