jenkins 1.528

Closes #22054.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
isl: move gdb script to gdb auto-load directory

This is where e.g. glib puts similar scripts; potentially gdb from
homebrew-versions needs to be configured to look here instead of in its
keg, but I'm not an expert.
Redis 2.6.15

Closes #22046.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>