Fix processing of elision in array literal

[sand1k]

Fixes the following tests from test262:

• ch15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-159.js
• ch15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-160.js
• ch15/15.2/15.2.3/15.2.3.7/15.2.3.7-6-a-155.js
• ch15/15.2/15.2.3/15.2.3.7/15.2.3.7-6-a-156.js
• ch15/15.4/15.4.4/15.4.4.14/15.4.4.14-9-a-10.js
• ch15/15.4/15.4.4/15.4.4.14/15.4.4.14-9-b-1.js
• ch15/15.4/15.4.4/15.4.4.14/15.4.4.14-9-b-i-15.js
• ch15/15.4/15.4.4/15.4.4.14/15.4.4.14-9-b-i-7.js
• ch15/15.4/15.4.4/15.4.4.15/15.4.4.15-8-a-10.js
• ch15/15.4/15.4.4/15.4.4.15/15.4.4.15-8-b-1.js
• ch15/15.4/15.4.4/15.4.4.15/15.4.4.15-8-b-i-15.js
• ch15/15.4/15.4.4/15.4.4.15/15.4.4.15-8-b-i-7.js
• ch15/15.4/15.4.4/15.4.4.16/15.4.4.16-7-b-11.js
• ch15/15.4/15.4.4/15.4.4.16/15.4.4.16-7-b-7.js
• ch15/15.4/15.4.4/15.4.4.16/15.4.4.16-7-c-i-16.js
• ch15/15.4/15.4.4/15.4.4.16/15.4.4.16-7-c-i-8.js
• ch15/15.4/15.4.4/15.4.4.17/15.4.4.17-7-b-11.js
• ch15/15.4/15.4.4/15.4.4.17/15.4.4.17-7-b-7.js
• ch15/15.4/15.4.4/15.4.4.17/15.4.4.17-7-c-i-16.js
• ch15/15.4/15.4.4/15.4.4.17/15.4.4.17-7-c-i-8.js
• ch15/15.4/15.4.4/15.4.4.18/15.4.4.18-7-b-11.js
• ch15/15.4/15.4.4/15.4.4.18/15.4.4.18-7-b-7.js
• ch15/15.4/15.4.4/15.4.4.18/15.4.4.18-7-c-i-16.js
• ch15/15.4/15.4.4/15.4.4.18/15.4.4.18-7-c-i-8.js
• ch15/15.4/15.4.4/15.4.4.19/15.4.4.19-8-b-11.js
• ch15/15.4/15.4.4/15.4.4.19/15.4.4.19-8-b-7.js
• ch15/15.4/15.4.4/15.4.4.19/15.4.4.19-8-c-i-16.js
• ch15/15.4/15.4.4/15.4.4.19/15.4.4.19-8-c-i-8.js
• ch15/15.4/15.4.4/15.4.4.20/15.4.4.20-9-b-11.js
• ch15/15.4/15.4.4/15.4.4.20/15.4.4.20-9-b-7.js
• ch15/15.4/15.4.4/15.4.4.20/15.4.4.20-9-c-i-16.js
• ch15/15.4/15.4.4/15.4.4.20/15.4.4.20-9-c-i-8.js
• ch15/15.4/15.4.4/15.4.4.21/15.4.4.21-8-b-iii-1-16.js
• ch15/15.4/15.4.4/15.4.4.21/15.4.4.21-8-b-iii-1-8.js
• ch15/15.4/15.4.4/15.4.4.21/15.4.4.21-9-b-11.js
• ch15/15.4/15.4.4/15.4.4.21/15.4.4.21-9-b-20.js
• ch15/15.4/15.4.4/15.4.4.21/15.4.4.21-9-b-24.js
• ch15/15.4/15.4.4/15.4.4.21/15.4.4.21-9-b-7.js
• ch15/15.4/15.4.4/15.4.4.21/15.4.4.21-9-c-i-16.js
• ch15/15.4/15.4.4/15.4.4.21/15.4.4.21-9-c-i-8.js
• ch15/15.4/15.4.4/15.4.4.22/15.4.4.22-8-b-iii-1-16.js
• ch15/15.4/15.4.4/15.4.4.22/15.4.4.22-8-b-iii-1-8.js
• ch15/15.4/15.4.4/15.4.4.22/15.4.4.22-9-b-11.js
• ch15/15.4/15.4.4/15.4.4.22/15.4.4.22-9-b-20.js
• ch15/15.4/15.4.4/15.4.4.22/15.4.4.22-9-b-24.js
• ch15/15.4/15.4.4/15.4.4.22/15.4.4.22-9-b-7.js
• ch15/15.4/15.4.4/15.4.4.22/15.4.4.22-9-c-i-16.js
• ch15/15.4/15.4.4/15.4.4.22/15.4.4.22-9-c-i-8.js

[egavrin]

Good to me

[zherczeg]

LGTM

[galpeter]

FYI: last time I did this fix (#319) I was told that adding a new simple value is not a good way to resolve the issue. Issue report: #356

[sand1k]

@galpeter, thank you for pointing this. We'll discuss it and, probably, make an update then.

[ruben-ayrapetyan]

I think new simple value is not necessary in the case.

[ruben-ayrapetyan]

The only thing that seems to be necessary is support of empty varg, and update of array_decl opcode handler.