mjpg-streamer: Fix build dependency

It needs to be on host. The target one is already covered below.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

multimedia/mjpg-streamer/Makefile

@@ -24,7 +24,7 @@ PKG_LICENSE_FILES:=LICENSE
 include $(INCLUDE_DIR)/package.mk
 include $(INCLUDE_DIR)/cmake.mk
 
-PKG_BUILD_DEPENDS:=MJPG_STREAMER_V4L2:libv4l zmq protobuf-c
+PKG_BUILD_DEPENDS:=MJPG_STREAMER_V4L2:libv4l zmq protobuf-c/host
 
 define Package/mjpg-streamer
   SECTION:=multimedia