move vp9_spatial_scalable_encoder.c to examples/

Change-Id: Id5c889cb87ad33a21d83a415a23e957e8ee3218f

examples.mk

@@ -54,7 +54,7 @@ vpxenc.SRCS                 += third_party/libmkv/EbmlWriter.h
 vpxenc.SRCS                 += $(LIBYUV_SRCS)
 vpxenc.GUID                  = 548DEC74-7A15-4B2B-AFC3-AA102E7C25C1
 vpxenc.DESCRIPTION           = Full featured encoder
-UTILS-$(CONFIG_VP9_ENCODER)    += vp9_spatial_scalable_encoder.c
+EXAMPLES-$(CONFIG_VP9_ENCODER)    += vp9_spatial_scalable_encoder.c
 vp9_spatial_scalable_encoder.SRCS += args.c args.h
 vp9_spatial_scalable_encoder.SRCS += ivfenc.c ivfenc.h
 vp9_spatial_scalable_encoder.SRCS += tools_common.c tools_common.h