fix "mmal: mmal_component_create_core: could not find component vc.ri…

…l.camera"

Fixes the following error (on Ubuntu 18.04 aarch64 using Raspbian kernel8.img (4.19.97-v8+ #1294)):
mmal: mmal_component_create_core: could not find component 'vc.ril.camera'
mmal: Failed to create camera component

For details refer to raspberrypi/userland#178

CMakeLists.txt

@@ -3,6 +3,7 @@ project(raspicam_node)
 
 
 set(CMAKE_CXX_STANDARD 14) # use C++14
+set(CMAKE_EXE_LINKER_FLAGS "-Wl,--no-as-needed")  # https://github.com/raspberrypi/userland/issues/178
 
 ## Find catkin macros and libraries
 ## if COMPONENTS list like find_package(catkin REQUIRED COMPONENTS xyz)