We cannot handle i64 values yet, so bail out if an indirect call
returns i64. The same bailout already exists for direct calls.

R=ahaas@chromium.org

Bug: v8:6600
Change-Id: I3ddf44a913ee79b5610862e3a93059c6d37a280c
Reviewed-on: https://chromium-review.googlesource.com/885813Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50862}