cmd/compile/internal/test: skip testpoint due to revert of CL 479095

cmd/compile/internal/test: skip testpoint due to revert of CL 479095

Skip one of the testpoints that verifies inlining, since it
no longer passes as a result of reverting CL 479095. Once we
roll forward with a new version of CL 479095 we can re-enable
this testpoint.

Change-Id: I41f6fb3fce78f31e60c5f0ed2856be0e66865149
Reviewed-on: https://go-review.googlesource.com/c/go/+/481755
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>