Added proper option names to the generate_arduino_firmware call.

In generate_avr_firmware the option names for HDRS, LIBS, AFLAGS
got left out. This mixed up all entries for these options and
they ended up in the SRCS option.

Author: TheMiles

cmake/Platform/Arduino.cmake

@@ -563,9 +563,9 @@ function(GENERATE_AVR_FIRMWARE INPUT_NAME)
         PROGRAMMER ${INPUT_PROGRAMMER}
         SERIAL ${INPUT_SERIAL}
         SRCS ${INPUT_SRCS}
-        ${INPUT_HDRS}
-        ${INPUT_LIBS}
-        ${INPUT_AFLAGS} )
+        HDRS ${INPUT_HDRS}
+        LIBS ${INPUT_LIBS}
+        AFLAGS ${INPUT_AFLAGS} )
 
 endfunction()