Made DSPTool more informative and actually fail when compile fails (right now it kept creating invalid files)

Also, created an example test which uses the INCLUDE directive. Tests are much shorter and human-readable now!

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3064 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/DSPCore/Src/DSPCodeUtil.cpp

@@ -35,8 +35,10 @@ bool Assemble(const char *text, std::vector<u16> *code)
 
 	// TODO: fix the terrible api of the assembler.
 	DSPAssembler assembler(settings);
-	if (!assembler.Assemble(text, code))
+	if (!assembler.Assemble(text, code)) {
 		printf("%s", assembler.GetErrorString().c_str());
+		return false;
+	}
 
 	return true;
 }