Cleanup ARM version of debugName() in DFGFPRInfo.h
https://bugs.webkit.org/show_bug.cgi?id=108090

Reviewed by David Kilzer.

Fixed debugName() so it will compile by adding static_cast<int> and missing commas.

* dfg/DFGFPRInfo.h:
(JSC::DFG::FPRInfo::debugName):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140976 268f45cc-cd09-0410-ab3c-d52691b4dbfc