zol: update submodule to have the >=5.2 compat followup fix included

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

diff --git a/submodules/zfsonlinux b/submodules/zfsonlinux
index 97bcaf4bef7552eeb3c48bdfad0c85b7800ee690..34f271eaf0d5fd5dba2b0f45ff2a3161385b3d3d 160000 (submodule)
--- a/submodules/zfsonlinux
+++ b/submodules/zfsonlinux
@@ -1 +1 @@
-Subproject commit 97bcaf4bef7552eeb3c48bdfad0c85b7800ee690
+Subproject commit 34f271eaf0d5fd5dba2b0f45ff2a3161385b3d3d