Update UTCP and replace gettimeofday() with clock_gettime().

[meshlink] / src / utcp

diff --git a/src/utcp b/src/utcp
index 96b97ab1291e339a36952532db8ce72e7efc45a1..0c3abf9e3538c482639ed32b0e85104495db5b4f 160000 (submodule)
--- a/src/utcp
+++ b/src/utcp
@@ -1 +1 @@
-Subproject commit 96b97ab1291e339a36952532db8ce72e7efc45a1
+Subproject commit 0c3abf9e3538c482639ed32b0e85104495db5b4f