Partial support of IFUNC tracing on PPC32

- Just like on PPC64, we need to move IRELATIVE relocations from
  .rela.dyn to the vector of PLT relocations

- Just like on PPC64, we may need to rename the symbol--except the
  symbol to looked is the one with the address of PLT slot address,
  not of rela addend.
3 files changed