rename build-kernel.sh -> build-kernel-deb.sh

This makes it runable by build-auto.sh.

Signed-off-by: Sage Weil <sage@inktank.com>
build-kernel-deb.sh: use a different kernel config for each flavor

Signed-off-by: Sage Weil <sage@inktank.com>
fabfile: make gitbuilder_kernel use build-auto.sh and sync from hostname

Signed-off-by: Sage Weil <sage@inktank.com>
fabfile: drop linus' github tree

Signed-off-by: Sage Weil <sage@inktank.com>
build-auto.sh: make deb/rpm rules specific to ceph

Signed-off-by: Sage Weil <sage@inktank.com>
build-kernel-deb: simplify flavor detection

Signed-off-by: Sage Weil <sage@inktank.com>