[gcc(refs/users/meissner/heads/work177-vpair)] Tweak vector-pair.h.

https://gcc.gnu.org/g:919a4a544acd1d04950899c18cf7fe1e12e99471 commit 919a4a544acd1d04950899c18cf7fe1e12e99471 Author: Michael Meissner Date: Thu Sep 12 13:26:30 2024 -0400 Tweak vector-pair.h. 2024-09-12 Michael Meissner * config/rs6000/vector-pair.h: If __VPA

[gcc(refs/users/meissner/heads/work177-vpair)] Tweak vector-pair.h.

https://gcc.gnu.org/g:9a08dcf8a5e0df45c387a43a65824341af478f65 commit 9a08dcf8a5e0df45c387a43a65824341af478f65 Author: Michael Meissner Date: Thu Sep 5 23:00:29 2024 -0400 Tweak vector-pair.h. 2024-09-04 Michael Meissner * config/rs6000/vector-pair.h: Add fixes