cmd/compile/internal/ir: fix a typo in node.go
README.md -> HACKING.md
Change-Id: I63909b86b2e6f8d9a34622f5d2b05048c79cd698
GitHub-Last-Rev:
afaab8f05eff1d66c796909ccf9912e0f4e99754
GitHub-Pull-Request: golang/go#50326
Reviewed-on: https://go-review.googlesource.com/c/go/+/374274
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>