update zfsonlinux to 0.7.13

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

diff --git a/submodules/zfsonlinux b/submodules/zfsonlinux
index fa456d6c4bc8e46603aaa17e101756003304eeb7..5e3e80687effd11a44a1cc6690eb532099b32a72 160000 (submodule)
--- a/submodules/zfsonlinux
+++ b/submodules/zfsonlinux
@@ -1 +1 @@
-Subproject commit fa456d6c4bc8e46603aaa17e101756003304eeb7
+Subproject commit 5e3e80687effd11a44a1cc6690eb532099b32a72