[mips] Move some structures represent MIPS specific ELF sections from LLD to LLVM

That allows to reuse the code in other tools like llvm-readobj etc.

No functional changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238188 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed