build UPDATE move base ABI version

Plugins ext API was changed, its version increased.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2ba7a3a..bbd6314 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -472,7 +472,7 @@
 
 # generate API/ABI report
 if("${BUILD_TYPE_UPPER}" STREQUAL "ABICHECK")
-    lib_abi_check(yang "${headers}" ${LIBYANG_SOVERSION_FULL} 708a8bfad983a4095c8d4dc537a9d2a1d5ca65c5)
+    lib_abi_check(yang "${headers}" ${LIBYANG_SOVERSION_FULL} a6bab1eb610325c316affb0f9a10737a36883a51)
 endif()
 
 # source code format target for Makefile