import interrupt.h in Arduino.h and add a declaration test

Author: PRosenb

SampleProjects/TestSomething/test/isr_declaration.cpp

@@ -0,0 +1,7 @@
+#include <ArduinoUnitTests.h>
+#include <Arduino.h>
+
+ISR (WDT_vect) {
+}
+
+unittest_main()

cpp/arduino/Arduino.h

@@ -24,6 +24,8 @@ typedef uint8_t byte;
 // Math and Trig
 #include "AvrMath.h"
 
+#include <avr/interrupt.h>
+
 #include "Godmode.h"
 
 

cpp/arduino/avr/interrupt.h

@@ -7,4 +7,4 @@
      extern "C" void vector (void)  __VA_ARGS__; \
      void vector (void)
 
-#endif
+#endif // _AVR_INTERRUPT_H_

cpp/arduino/avr/wdt.h

@@ -1,7 +1,6 @@
 #ifndef _AVR_WDT_H_
 #define _AVR_WDT_H_
 
-#include <avr/interrupt.h>
 #include <Godmode.h>
 
 #define WDTO_15MS   0