Use glib memory allocation and free functions

qemu_malloc/qemu_free no longer exist after this commit.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/qemu-thread-win32.c b/qemu-thread-win32.c
index 2d2d5ab..a27332e 100644
--- a/qemu-thread-win32.c
+++ b/qemu-thread-win32.c
@@ -249,7 +249,7 @@
 
     struct QemuThreadData *data;
     qemu_thread_init();
-    data = qemu_malloc(sizeof *data);
+    data = g_malloc(sizeof *data);
     data->thread = thread;
     data->start_routine = start_routine;
     data->arg = arg;