[mips] Fix out-of-date debug information in test file.

[mips] Fix out-of-date debug information in test file.

Update the debug info in the check-lines because the change in r243638
introduced a constant initialization before the prologue's end as part
of a register spill.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243640 91177308-0d34-0410-b5e6-96231b3b80d8