cmd/compile/internal/inline/inlheur: fixup tests for NewBasicLit change

cmd/compile/internal/inline/inlheur: fixup tests for NewBasicLit change

Fix a regression test to use the correct new signature for
ir.NewBasicLit.

Change-Id: I06c849e83a5edfce784c780b5490f461f6c3b129
Reviewed-on: https://go-review.googlesource.com/c/go/+/527318
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>