[Mips] Handle one byte unsupported relocations

Fail gracefully instead of crashing upon encountering
this type of relocation.

Differential revision: https://reviews.llvm.org/D41857


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322266 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed