Set correct size of PT_PHDR ELF segment.

This is just a nit pick, I do not believe that having it too
long could have caused any trouble since the correct number of
elements is stored in ELF header and extra space was zero padded.

Bug: 20556771
Change-Id: Ide56e6aa40f9b7175b55a830caf34c47e48213af
1 file changed