Pager struct allocated from boot memory and never referenced after boot.

We still have to have the pager structs because they possess intermediate
data during boot up such as for transferring of capability lists to
boot stack one-by-one, and then to newly generated ktcbs.

src/generic/container.c

@@ -7,6 +7,7 @@
 #include <l4/generic/resource.h>
 #include <l4/generic/capability.h>
 #include <l4/generic/cap-types.h>
+#include <l4/generic/bootmem.h>
 #include <l4/api/errno.h>
 #include INC_GLUE(memory.h)
 #include INC_SUBARCH(mm.h)
@@ -25,6 +26,8 @@ int container_init(struct container *c)
 	cap_list_init(&c->cap_list);
 
 	/* Init pager structs */
+	c->pager = alloc_bootmem(sizeof(c->pager[0]) *
+				 CONFIG_MAX_PAGERS_USED, 0);
 	for (int i = 0; i < CONFIG_MAX_PAGERS_USED; i++)
 		cap_list_init(&c->pager[i].cap_list);