udebug: update to Git HEAD (2026-01-16)

c5c493ed5787 udebug-cli: fix reference to invalid variable in error message
875e1a7af6ca udebug-cli: add logdump command

Signed-off-by: Felix Fietkau <nbd@nbd.name>
(cherry picked from commit 55c498e)

Author: nbd168

package/libs/udebug/Makefile

@@ -11,9 +11,9 @@ PKG_NAME:=udebug
 CMAKE_INSTALL:=1
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/udebug.git
-PKG_MIRROR_HASH:=eb40871f2259e17b6e3ee2c01930a6faffb5e0a7db7589827a9e1efda267726f
-PKG_SOURCE_DATE:=2025-10-21
-PKG_SOURCE_VERSION:=75f39cd4a8067a6f0503c2f1c83c6b1af733a6f2
+PKG_MIRROR_HASH:=3e311a05ddc9f2641d3bda4b83a3c70a80a03b4de5cae663d1b8be336fe8c878
+PKG_SOURCE_DATE:=2026-01-16
+PKG_SOURCE_VERSION:=875e1a7af6ca9d86524d18169c3a79f4a1920053
 PKG_ABI_VERSION:=$(call abi_version_str,$(PKG_SOURCE_DATE))
 
 PKG_LICENSE:=GPL-2.0