libu64.a identification (#43)

* identify debug

* identify gfxprint.c and gfxprint_data.c

* pad.c

* fix

* stackcheck

* loadfragment and logseverity

* mtxconv

* comment

* Revert "loadfragment and logseverity"

This reverts commit 34d8214aa3.

* review

* fix

* another fix

* fix

src/code/game.c

@@ -4,7 +4,7 @@
 #include "67E840.h"
 #include "speed_meter.h"
 #include "graph.h"
-#include "debug.h"
+#include "libu64/debug.h"
 #include "libc64/malloc.h"
 #include "6EDD10.h"
 #include "padmgr.h"

src/code/irqmgr.c

@@ -1,6 +1,6 @@
 
 #include "irqmgr.h"
-#include "stackcheck.h"
+#include "libu64/stackcheck.h"
 #include "m_thread.h"
 #include "PR/os_internal.h"
 #include "macros.h"