Update to 1.25.0.

• The ABI patch is no longer needed on head due to fixes being upstreamed to use the pre-ino64 symbols. The ABI patch is still needed for the bootstrap but should be removable for 1.26.0 if it uses beta 2018-03-18.

PR: 227130 [based on]
Tested by: dumbbell, Charlie Li
Submitted by: riggs [based on]
Differential Revision: https://reviews.freebsd.org/D14921 [based on]