NOJIRA: Rename color switch cc to cpp for clang support (SiliconLabsSoftware#24)

Author: silabs-aydogane

applications/zpc/components/zwave_command_classes/CMakeLists.txt

@@ -46,7 +46,7 @@ add_library(
   src/zwave_command_class_supervision.c
   src/zwave_command_class_supervision_process.cpp
   src/zwave_command_class_sound_switch.c
-  src/zwave_command_class_switch_color.c
+  src/zwave_command_class_switch_color.cpp
   src/zwave_command_class_switch_multilevel.c
   src/zwave_command_class_thermostat_mode.c
   src/zwave_command_class_thermostat_fan_mode.c