[rules/sonic-utilities.mk]: Add libyang as build time dependencies for sonic-utilities. (#4850)

sonic-utils has sonic-yang-mgmt as build time deps, which inturn installs libyang.
libyang is needed to run newly added test.
If sonic-yang-mgmt is already built then libyang will not be installed in slave docker
without this PR and test will not run.

Signed-off-by: Praveen Chaudhary pchaudhary@linkedin.com

rules/sonic-utilities.mk

@@ -12,5 +12,7 @@
 
 SONIC_UTILS = python-sonic-utilities_1.2-1_all.deb
 $(SONIC_UTILS)_SRC_PATH = $(SRC_PATH)/sonic-utilities
-$(SONIC_UTILS)_WHEEL_DEPENDS += $(SONIC_CONFIG_ENGINE) $(SONIC_YANG_MGMT_PY)
+$(SONIC_UTILS)_DEBS_DEPENDS = $(LIBYANG) $(LIBYANG_CPP) $(LIBYANG_PY2) \
+                                     $(LIBYANG_PY3)
+$(SONIC_UTILS)_WHEEL_DEPENDS = $(SONIC_CONFIG_ENGINE) $(SONIC_YANG_MGMT_PY)
 SONIC_PYTHON_STDEB_DEBS += $(SONIC_UTILS)