[Mips] 80 column.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@207493 91177308-0d34-0410-b5e6-96231b3b80d8
[Mips] Implement emitting of R_MIPS_REL32 relocations:

1. Re-implement PLT entries and dynamic relocations emitting to keep PLT
and relocations table in a consistent state.

2. Initialize st_value and st_other fields for dynamic symbols table
entry if this entry corresponds to an external function which address is
taken in a non-PIC executable. In that case the st_value field holds an
address of the function's PLT entry. Also set STO_MIPS_PLT bit in the
st_other field.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@207494 91177308-0d34-0410-b5e6-96231b3b80d8