[OE-core] jethro backports

[Andre McCurdy]

Hi Robert,

Could you please consider backporting the following fixes to jethro:

  c075d6e directfb.inc: force bfd linker for armv7a
  c725328 prelink: Fix various prelink issues on IA32, ARM, and MIPS.
  70c55aa gcc: Update default Power GCC settings to use secure-plt
  12c86bd glibc: Fix ld.so / prelink interface for
ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA
  cb8f842 cairo: fix license for cairo-script-interpreter

Thanks