[sFlow] - Fix memory leak (#6662)

* Bump version number to 2.0.32-1 to include a fix for a memory-leak
  found during testing. A wrong API is used to free the cJSON
  data-structure, which only frees the first pointed-to structure.
  The proper API should recursively free all structures.

Signed-off-by: Garrick He <garrick_he@dell.com>

rules/sflow.mk

@@ -1,7 +1,7 @@
 # host-sflow package
 
-HSFLOWD_VERSION = 2.0.28
-HSFLOWD_SUBVERSION = 2
+HSFLOWD_VERSION = 2.0.32
+HSFLOWD_SUBVERSION = 1
 export HSFLOWD_VERSION HSFLOWD_SUBVERSION
 
 HSFLOWD = hsflowd_$(HSFLOWD_VERSION)-$(HSFLOWD_SUBVERSION)_$(CONFIGURED_ARCH).deb