simplify signature.h generation (#3480)

* simplify

* poke to force generate

firmware/gen_signature.sh

@@ -10,9 +10,9 @@ echo "Generating signature for ${SHORT_BOARDNAME}"
 
 # generate a unique signature
 date=`TZ=Europe/London date +"%Y.%m.%d"`
-echo "// Generated by gen_signature.sh" > ${SIGNATURE_FILE_NAME}
+echo "! Generated by gen_signature.sh" > ${SIGNATURE_FILE_NAME}
 
-echo "// SIGNATURE_HASH is a built-in variable generated by ConfigDefinition.jar" >> ${SIGNATURE_FILE_NAME}
+echo "! SIGNATURE_HASH is a built-in variable generated by ConfigDefinition.jar" >> ${SIGNATURE_FILE_NAME}
 
 echo "#define TS_SIGNATURE \"rusEFI $date.${SHORT_BOARDNAME}.@@SIGNATURE_HASH@@\"" >> ${SIGNATURE_FILE_NAME}
 

firmware/integration/rusefi_config.txt

@@ -2004,3 +2004,5 @@ end_struct
 ! we need to improve this further - at the moment we need too many boards to prepend 'false'
 #define show_test_presets true
 #define show_Frankenso_presets true
+
+! poke