fate/api-{jpeg,png}-codec-param: add missing codec dependencies

tests/fate/api.mak

@@ -20,11 +20,11 @@ fate-api-seek: CMD = run $(APITESTSDIR)/api-seek-test $(TARGET_PATH)/tests/data/
 fate-api-seek: CMP = null
 fate-api-seek: REF = /dev/null
 
-FATE_API_SAMPLES_LIBAVFORMAT-yes += fate-api-png-codec-param
+FATE_API_SAMPLES_LIBAVFORMAT-$(call DEMDEC, IMAGE2, PNG) += fate-api-png-codec-param
 fate-api-png-codec-param: $(APITESTSDIR)/api-codec-param-test$(EXESUF)
 fate-api-png-codec-param: CMD = run $(APITESTSDIR)/api-codec-param-test $(TARGET_SAMPLES)/png1/lena-rgba.png
 
-FATE_API_SAMPLES_LIBAVFORMAT-yes += fate-api-jpeg-codec-param
+FATE_API_SAMPLES_LIBAVFORMAT-$(call DEMDEC, IMAGE2, MJPEG) += fate-api-jpeg-codec-param
 fate-api-jpeg-codec-param: $(APITESTSDIR)/api-codec-param-test$(EXESUF)
 fate-api-jpeg-codec-param: CMD = run $(APITESTSDIR)/api-codec-param-test $(TARGET_SAMPLES)/exif/image_small.jpg