upgpkg: arm-none-eabi-gcc 4.9.0-3

Use gcc snapshots, the same was as 'gcc' does.


git-svn-id: file:///srv/repos/svn-community/svn@112779 9fca08f4-af9d-4005-b8df-a31f2cc04f65
archrelease: copy trunk to community-staging-i686, community-staging-x86_64

git-svn-id: file:///srv/repos/svn-community/svn@112780 9fca08f4-af9d-4005-b8df-a31f2cc04f65