change #include "../hello.h" to "hello.h"

Before we can -I the top-level src/ directory alone, references to
"hello.h" must be updated.  This is an internal header, so it does
not need angle brackets.

src/jtag/drivers/dummy.c

@@ -23,7 +23,7 @@
 
 #include <jtag/interface.h>
 #include "bitbang.h"
-#include "../hello.h"
+#include "hello.h"
 
 
 /* my private tap controller state, which tracks state for calling code */