MFC r296319:Fix handling of DT_TEXTREL for an object with more than one read-onlysegment.PR: 207631
MFC r289324:Allow PT_NOTES segments to be located anywhere in the executableimage.
MFC r264346 (by alc):Pass MAP_ALIGNED_SUPER to allocate the whole dso region if its text is largeenough for the superpage mapping.