[ELF][MIPS] Always collect .reginfo, .MIPS.options, and .MIPS.abiflags input sections

Do not take in account the `Live` flag while collecting .reginfo, .MIPS.options,
and .MIPS.abiflags input sections to produce corresponding output sections.
These sections have information purpose and should be always produced per
ABI requirements.

llvm-svn: 298093