Unreviewed, ARM64 buildfix after r167336.

* assembler/MacroAssemblerARM64.h:
(JSC::MacroAssemblerARM64::branchAdd32): Add missing function.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@167347 268f45cc-cd09-0410-ab3c-d52691b4dbfc