[build][asan] make dpkg cache asan-aware

Currently, the build with ASAN_ENABLE=y reuses the packages built with
ASAN_ENABLE=n (and vice versa). To address this issue, ASAN_ENABLE is added to the
SONIC_COMMON_FLAGS_LIST.

Signed-off-by: Yakiv Huryk <yhuryk@nvidia.com>

Makefile.cache

@@ -71,7 +71,9 @@ SONIC_COMMON_FLAGS_LIST :=  $(CONFIGURED_PLATFORM) \
                             $(CONFIGURED_ARCH) \
                             $(BLDENV) \
                             $(SONIC_DEBUGGING_ON) \
-                            $(SONIC_PROFILING_ON) $(SONIC_ENABLE_SYNCD_RPC)
+                            $(SONIC_PROFILING_ON) \
+                            $(SONIC_ENABLE_SYNCD_RPC) \
+                            $(ENABLE_ASAN)
 SONIC_COMMON_DPKG_LIST  :=  debian/control debian/changelog debian/rules \
                             debian/compat debian/install debian/copyright
 SONIC_COMMON_BASE_FILES_LIST  := sonic-slave-jessie/Dockerfile.j2 sonic-slave-jessie/Dockerfile.user.j2 \