Move elf_ops.h -> include/hw/elf_ops.h

+ qemu-thread.h -> include/qemu/thread.h
+ qemu-os-*.h -> include/sysemu/os-*.h

Change-Id: I68a58a817e54a7f607b34b7a9b34e38a685233ea
diff --git a/cpus.c b/cpus.c
index 40d6965..9d3ad5f 100644
--- a/cpus.c
+++ b/cpus.c
@@ -265,7 +265,7 @@
 
 #else /* CONFIG_IOTHREAD */
 
-#include "qemu-thread.h"
+#include "qemu/thread.h"
 
 QemuMutex qemu_global_mutex;
 static QemuMutex qemu_fair_mutex;