Arduino.mk: Fix generating assembly for cpp files.

Do not include the Arduino header when generating assembly for .cpp
files with generate_assembly.  This was likely a copy-paste error.

Arduino.mk

@@ -1262,7 +1262,7 @@ $(OBJDIR)/%.s: %.ino $(COMMON_DEPS) | $(OBJDIR)
 
 $(OBJDIR)/%.s: %.cpp $(COMMON_DEPS) | $(OBJDIR)
 	@$(MKDIR) $(dir $@)
-	$(CXX) -x c++ -include $(ARDUINO_HEADER) -MMD -S -fverbose-asm $(CPPFLAGS) $(CXXFLAGS) $< -o $@
+	$(CXX) -x c++ -MMD -S -fverbose-asm $(CPPFLAGS) $(CXXFLAGS) $< -o $@
 
 # core files
 $(OBJDIR)/core/%.c.o: $(ARDUINO_CORE_PATH)/%.c $(COMMON_DEPS) | $(OBJDIR)

HISTORY.md

@@ -5,6 +5,7 @@ The following is the rough list of changes that went into different versions.
 I tried to give credit whenever possible. If I have missed anyone, kindly add it to the list.
 
 ### In Development
+- Fix: Do not include the Arduino header when calling generate_assembly on .cpp files. (https://github.com/Batchyx)
 
 ### 1.5.2 (2017-01-11)