Make arm embedded toolchain multilib aware, now it contains packages for several arm* platforms

Move newlib off gcc package
Update gcc to 4.9.2
Use in-tree isl for gcc



git-svn-id: file:///srv/repos/svn-community/svn@121890 9fca08f4-af9d-4005-b8df-a31f2cc04f65
archrelease: copy trunk to community-testing-any

git-svn-id: file:///srv/repos/svn-community/svn@121891 9fca08f4-af9d-4005-b8df-a31f2cc04f65
archrelease: copy trunk to community-testing-i686, community-testing-x86_64

git-svn-id: file:///srv/repos/svn-community/svn@121892 9fca08f4-af9d-4005-b8df-a31f2cc04f65