runtime: adjust address calculation in identifying abort on windows/arm
Apparently we're being called on arm 1 byte off, just like on 386 and
amd64, so unify the handler for isAbortPC.
Fixes #42859.
Updates #29050.
Change-Id: I97fffeb4a33d93ca3397ce1c9ba2b05137f391ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/273727
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Trust: Alex Brainman <alex.brainman@gmail.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>