Update makefile to support armhf (#132) (#133)

Why I did it
Telemetry service crashed on armhf platform.

How I did it
Update makefile, and armhf is 32-bit.

How to verify it
Install new image on armhf platform, and telemetry service should be fine.

swsscommon/Makefile

@@ -6,6 +6,10 @@ SWIG_FLAG = -go -cgo -c++ -intgosize 64
 ifeq ($(CONFIGURED_ARCH),arm64)
 SWIG_FLAG += -DSWIGWORDSIZE64
 endif
+ifeq ($(CONFIGURED_ARCH),armhf)
+SWIG_FLAG = -go -cgo -c++ -intgosize 32 -DSWIGWORDSIZE32
+endif
+
 
 .PHONY: all clean
 
@@ -14,4 +18,4 @@ all:
 	$(SWIG) $(SWIG_FLAG) -I/usr/include/swss/ swsscommon.i
 
 clean:
-	$(RM) *.go *.cxx *.i
+	$(RM) *.go *.cxx *.i