message: Fix broken EXTENDED_MEDIA_MODE build
  During CMake refactoring, the necessary include directories for gstreamer were removed from the list for the main executable. This resulted in an build error during the `make` step where the gstreamer headers could not be found. These changes fix this issue.
diff: @@ -32,6 +32,15 @@ include(${CMAKE_SOURCE_DIR}/tools/cmake/helpers/sources.cmake)
  find_package(SDLOpenSSL REQUIRED)
  +if (EXTENDED_MEDIA_MODE)
  + set(default_media_inc
  + ${GSTREAMER_gst_INCLUDE_DIR}
  + ${GSTREAMER_gstconfig_INCLUDE_DIR}
  + )
  +else(EXTENDED_MEDIA_MODE)
  + set(default_media_inc)
  +endif()
  +
  include_directories(
  ${COMPONENTS_DIR}/protocol_handler/include
  ${COMPONENTS_DIR}/application_manager/include
  @@ -56,6 +65,7 @@ include_directories(
  ${JSONCPP_INCLUDE_DIRECTORY}
  ${LOG4CXX_INCLUDE_DIRECTORY}
  ${OPENSSL_INCLUDE_DIRECTORY}
  + ${default_media_inc}
  ${MESSAGE_BROKER_INCLUDE_DIRECTORY}
  )
  @@ -75,15 +85,6 @@ cmake_policy(SET CMP0015 NEW)
  link_directories(${LIBUSB_LIBS_DIRECTORY})
  cmake_policy(POP)
  -if (EXTENDED_MEDIA_MODE)
  - set(default_media_inc
  - ${GSTREAMER_gst_INCLUDE_DIR}
  - ${GSTREAMER_gstconfig_INCLUDE_DIR}
  - )
  -else(EXTENDED_MEDIA_MODE)
  - set(default_media_inc)
  -endif()
  -
  if (TELEMETRY_MONITOR)
  set(TELEMETRY_MONITOR_LIB
  TelemetryMonitor
  