[globalisel][tablegen] Add several GINodeEquiv's for operators that do not...

[globalisel][tablegen] Add several GINodeEquiv's for operators that do not require additional support.

Summary:
As of this patch, 350 out of 3938 rules are currently imported.

Depends on D32229

Reviewers: qcolombet, kristof.beyls, rovka, t.p.northover, ab, aditya_nandakumar

Reviewed By: ab

Subscribers: dberris, llvm-commits, igorb

Differential Revision: https://reviews.llvm.org/D32275

llvm-svn: 302154