[Mips] Rewrite R_MIPS_32 handling test using the yaml2obj tool.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@206019 91177308-0d34-0410-b5e6-96231b3b80d8
[Mips] Rewrite R_MIPS_26 handling test using the yaml2obj tool.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@206020 91177308-0d34-0410-b5e6-96231b3b80d8