Crash at JSC::call when loading www.gap.com with JSVALUE32_64 Enabled
https://bugs.webkit.org/show_bug.cgi?id=108991

Reviewed by Oliver Hunt.

Changed the restoration from calleeGPR to nonArgGPR0 because the restoration of the return location
may step on calleeGPR is it happen to be nonArgGPR2.

* dfg/DFGRepatch.cpp:
(JSC::DFG::dfgLinkClosureCall):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@141951 268f45cc-cd09-0410-ab3c-d52691b4dbfc