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/posix-aio-compat.c b/posix-aio-compat.c
index 8dc00cb..babb094 100644
--- a/posix-aio-compat.c
+++ b/posix-aio-compat.c
@@ -634,7 +634,7 @@
     if (posix_aio_state)
         return 0;
 
-    s = qemu_malloc(sizeof(PosixAioState));
+    s = g_malloc(sizeof(PosixAioState));
 
     sigfillset(&act.sa_mask);
     act.sa_flags = 0; /* do not restart syscalls to interrupt select() */