[Tests][ConstraintElim] autogen newly-added case in large-constant-ints.ll (NFC)

I forgot to do this in 66ec5df3 / https://reviews.llvm.org/D158810.

Since this is testing for an assertion failure, the test checks don't matter, but we might as well avoid unnecessary churn the next time someone modifies this test.

(cherry picked from commit df112cba)