merge in ARM fast blt code
merge in ARM fast blt code

git-svn-id: http://squeakvm.org/svn/squeak/branches/Cog@2923 fa1542d4-bde8-0310-ad64-8ed1123d492a

Former-commit-id: fa3af3a8b08ec1c11f5fa1e4409d98065700c5ff
OpenSmalltalk/vm,OpenSmalltalk/vm,OpenSmalltalk/vm,timfel/squeakvm,OpenSmalltalk/vm,peteruhnak/pharo-vm,timfel/squeakvm,peteruhnak/pharo-vm,bencoman/pharo-vm,peteruhnak/pharo-vm,timfel/squeakvm,peteruhnak/pharo-vm,timfel/squeakvm,OpenSmalltalk/vm,bencoman/pharo-vm,timfel/squeakvm,OpenSmalltalk/vm,peteruhnak/pharo-vm,peteruhnak/pharo-vm,bencoman/pharo-vm,OpenSmalltalk/vm,peteruhnak/pharo-vm,bencoman/pharo-vm,OpenSmalltalk/vm,peteruhnak/pharo-vm,timfel/squeakvm,timfel/squeakvm,bencoman/pharo-vm,bencoman/pharo-vm,bencoman/pharo-vm,timfel/squeakvm,bencoman/pharo-vm,bencoman/pharo-vm