Make invalid LHSs a parse-time (reference) error

This is required by the spec. It also prevents crashes resulting from the attempt to read type feedback for the RHS of an invalid assignment which full codegen never actually allocated info for.

To do: check properly in preparser already.

R=marja@chromium.org, mstarzinger@chromium.org
BUG=351658
LOG=Y

Review URL: https://codereview.chromium.org/200473003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19976 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix C++ compilation issue

TBR=marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/199743006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19977 ce2b1a6d-e550-0410-aec6-3dcde31c8c00