Remove functions.h (#2501)

* split most of functions.h

* osdriverominit

* forgot include

* fix

* remove functions.h

* temporary fix for fix_bss

* fix bss

* revert fix_bss.py change

include/is_debug.h

@@ -0,0 +1,18 @@
+#ifndef IS_DEBUG_H
+#define IS_DEBUG_H
+
+#include "libc/stddef.h"
+#include "attributes.h"
+
+#if DEBUG_FEATURES
+void isPrintfInit(void);
+#endif
+
+void rmonPrintf(const char* fmt, ...);
+
+#if DEBUG_FEATURES
+void* is_proutSyncPrintf(void* arg, const char* str, size_t count);
+NORETURN void func_80002384(const char* exp, const char* file, int line);
+#endif
+
+#endif