bomb.run: define resource preservation for init

This patch increases init's preserved RAM and capability quota to
account for a current limitation of init with respect to the creation of
sessions to parent services:

In contrast to regular routed services, sessions to parent services are
created via 'Env::session'. The implementation of 'Env::session'
automatically upgrades session quotas on demand, which is the desired
behavior for regular 'Connection' objects. However, for sessions
established on the behalf of init's children, we would need to reflect
the error condition to the child instead of resolving it locally within
init (by subsidizing the session with init's quota). This patch leaves
this issue unresolved but fixes the symptom for the bomb test. It is
meant as an interim solution until the handling of parent sessions is
revised.

repos/os/run/bomb.run

@@ -35,6 +35,8 @@ set config {
 	<default-route>
 		<any-service> <parent/> <any-child/> </any-service>
 	</default-route>
+	<resource name="RAM" preserve="2M"/>
+	<resource name="CAP" preserve="100"/>
 	<start name="timer" caps="100">
 		<resource name="CPU" quantum="10"/>
 		<resource name="RAM" quantum="1M"/>