LayoutTests/js/script-tests/reentrant-caching.js crashing on 32 bit builds

LayoutTests/js/script-tests/reentrant-caching.js crashing on 32 bit builds
https://bugs.webkit.org/show_bug.cgi?id=140843

Reviewed by Oliver Hunt.

When we are in vmEntryToJavaScript, we keep the stack pointer at an
alignment sutiable for pointing to a call frame header, which is the
alignment post making a call.  We adjust the sp when calling to JS code,
but don't adjust it before calling the out of stack handler.

* llint/LowLevelInterpreter32_64.asm:
Moved stack point down 8 bytes to get it aligned.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@179035 268f45cc-cd09-0410-ab3c-d52691b4dbfc