Oops - there are some other rpms associated with the gcc component that also need to be rebuilt:
Reproduced with 4.8.5-22.el7, VERIFIED for 4.8.5-25.el7.
Added a simple testcase that should ring a bell if the relocs occur there again.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.