Import JavaScript Test Changes from JavaScriptCore

Changes imported in this pull request include all changes made since
c0dba7aed4 in JavaScriptCore and all changes made since 7a0293f26c in
test262.

27 Files Updated From JavaScriptCore

These files have been modified in JavaScriptCore.

• implementation-contributed/javascriptcore/stress/let-lexical-binding-shadow-existing-global-property-ftl.js
• implementation-contributed/javascriptcore/stress/new-largeish-contiguous-array-with-size.js
• implementation-contributed/javascriptcore/stress/op_add.js
• implementation-contributed/javascriptcore/stress/op_bitand.js
• implementation-contributed/javascriptcore/stress/op_bitor.js
• implementation-contributed/javascriptcore/stress/op_bitxor.js
• implementation-contributed/javascriptcore/stress/op_lshift-ConstVar.js
• implementation-contributed/javascriptcore/stress/op_lshift-VarConst.js
• implementation-contributed/javascriptcore/stress/op_lshift-VarVar.js
• implementation-contributed/javascriptcore/stress/op_mod-ConstVar.js
• implementation-contributed/javascriptcore/stress/op_mod-VarConst.js
• implementation-contributed/javascriptcore/stress/op_mod-VarVar.js
• implementation-contributed/javascriptcore/stress/op_mul-ConstVar.js
• implementation-contributed/javascriptcore/stress/op_mul-VarConst.js
• implementation-contributed/javascriptcore/stress/op_mul-VarVar.js
• implementation-contributed/javascriptcore/stress/op_rshift-ConstVar.js
• implementation-contributed/javascriptcore/stress/op_rshift-VarConst.js
• implementation-contributed/javascriptcore/stress/op_rshift-VarVar.js
• implementation-contributed/javascriptcore/stress/op_sub-ConstVar.js
• implementation-contributed/javascriptcore/stress/op_sub-VarConst.js
• implementation-contributed/javascriptcore/stress/op_sub-VarVar.js
• implementation-contributed/javascriptcore/stress/op_urshift-ConstVar.js
• implementation-contributed/javascriptcore/stress/op_urshift-VarConst.js
• implementation-contributed/javascriptcore/stress/op_urshift-VarVar.js
• implementation-contributed/javascriptcore/stress/sampling-profiler-richards.js
• implementation-contributed/javascriptcore/stress/spread-forward-call-varargs-stack-overflow.js
• implementation-contributed/javascriptcore/stress/try-get-by-id-should-spill-registers-dfg.js

5 Files Have Been Deleted in JavaScriptCore

These files have been deleted in JavaScriptCore and are removed from the
implementation-contributed/javascriptcore directory.

• implementation-contributed/javascriptcore/stress/object-tostring-changed-proto.js
• implementation-contributed/javascriptcore/stress/object-tostring-changed.js
• implementation-contributed/javascriptcore/stress/object-tostring-misc.js
• implementation-contributed/javascriptcore/stress/object-tostring-other.js
• implementation-contributed/javascriptcore/stress/object-tostring-untyped.js

17 New Files Added in JavaScriptCore

These are new files added in JavaScriptCore and have been synced to the
implementation-contributed/javascriptcore directory.

• implementation-contributed/javascriptcore/stress/availability-was-cleared-when-locals-are-not-live.js
• implementation-contributed/javascriptcore/stress/big-int-value-op-update-gc-rules.js
• implementation-contributed/javascriptcore/stress/constant-fold-double-rep-into-double-constant.js
• implementation-contributed/javascriptcore/stress/data-view-set-intrinsic-undefined-result-2.js
• implementation-contributed/javascriptcore/stress/data-view-set-intrinsic-undefined-result.js
• [implementation-contributed/javascriptcore/stress/dfg-to-string-on-int-does-gc.js](../blob/javascriptcore-test262-automation-export-7a0293f26c/implementation-contributed/javascriptcore/stress/dfg-to-string-on-int-does.......report too long for Github. Review Travis log for full output of changes files.