libamxo: bump to dev_PPW-724

Integrates following changes:
- unit-test: Loading instances with unique values can fail if value is not part of the instance header. (PPW-724) (dca206a3)

References: PPW-724
Signed-off-by: prplbot <bot@prplfoundation.org>

libs/libamxo/Makefile

@@ -3,13 +3,14 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libamxo
-PKG_VERSION:=v5.5.1
+PKG_VERSION:=dev_PPW-724
 SHORT_DESCRIPTION:=Ambiorix Object Definition Language library
 
-PKG_SOURCE:=libamxo-v5.5.1.tar.gz
-PKG_SOURCE_URL:=https://gitlab.com/prpl-foundation/components/ambiorix/libraries/libamxo/-/archive/v5.5.1
-PKG_HASH:=8692da5ae8b2ca522f8b1c3a8641e8fef301bd5981ee9b909dc07a4ac35a5728
-PKG_BUILD_DIR:=$(BUILD_DIR)/libamxo-v5.5.1
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_VERSION:=dev_PPW-724
+PKG_SOURCE_URL:=https://gitlab.com/prpl-foundation/components/ambiorix/libraries/libamxo.git
+PKG_MIRROR_HASH:=skip
+PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
 PKG_MAINTAINER:=Soft At Home <support.opensource@softathome.com>
 PKG_LICENSE:=BSD-2-Clause-Patent
 PKG_LICENSE_FILES:=LICENSE