update submodule: libprov

diff --git a/libprov b/libprov
index 0b445c73ae1e87577430c6884cdeeca1afa36dbd..d5d381f71c90fe0c91f861784b715b189554f1f2 160000 (submodule)
--- a/libprov
+++ b/libprov
@@ -1 +1 @@
-Subproject commit 0b445c73ae1e87577430c6884cdeeca1afa36dbd
+Subproject commit d5d381f71c90fe0c91f861784b715b189554f1f2