Build break on ARMv7 after r157209

Build break on ARMv7 after r157209
https://bugs.webkit.org/show_bug.cgi?id=122890

Patch by Brian Holt <brian.holt@samsung.com> on 2013-10-22
Reviewed by Csaba Osztrogonác.

Add framePointerRegister and first/last register helpers for ARM_TRADITIONAL.

* assembler/ARMAssembler.h:
* assembler/MacroAssemblerARM.h:
(JSC::MacroAssemblerARM::firstRegister):
(JSC::MacroAssemblerARM::lastRegister):
(JSC::MacroAssemblerARM::firstFPRegister):
(JSC::MacroAssemblerARM::lastFPRegister):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@157784 268f45cc-cd09-0410-ab3c-d52691b4dbfc