(lyskomd_death): Collect etc/memory-usage in usage.all.

src/server/testsuite/config/unix.exp

@@ -264,6 +264,7 @@ proc lyskomd_death {} {
 	timeout  { fail "$test (timeout)" }
 	eof      { pass "$test"; wait }
     }
+    system "cat etc/memory-usage >> usage.all"
 }
 
 proc client_start {nr} {