Fixed missing unimplemented part

git-svn-id: https://svn.inf.ethz.ch/svn/lecturers/a2/trunk@8689 8c9fc860-2736-0410-a75d-ab315db34111

source/Unix.Machine.Mod

@@ -457,6 +457,8 @@ CODE
 	RDTSC	; set EDX:EAX
 	SHL RDX, 32
 	OR RAX, RDX
+#ELSE
+	unimplemented
 #END
 END GetTimer;