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/cutils.c b/cutils.c
index 28049e0..f2bcf20 100644
--- a/cutils.c
+++ b/cutils.c
@@ -136,7 +136,7 @@
 
 void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint)
 {
-    qiov->iov = qemu_malloc(alloc_hint * sizeof(struct iovec));
+    qiov->iov = g_malloc(alloc_hint * sizeof(struct iovec));
     qiov->niov = 0;
     qiov->nalloc = alloc_hint;
     qiov->size = 0;
@@ -160,7 +160,7 @@
 
     if (qiov->niov == qiov->nalloc) {
         qiov->nalloc = 2 * qiov->nalloc + 1;
-        qiov->iov = qemu_realloc(qiov->iov, qiov->nalloc * sizeof(struct iovec));
+        qiov->iov = g_realloc(qiov->iov, qiov->nalloc * sizeof(struct iovec));
     }
     qiov->iov[qiov->niov].iov_base = base;
     qiov->iov[qiov->niov].iov_len = len;
@@ -217,7 +217,7 @@
 {
     assert(qiov->nalloc != -1);
 
-    qemu_free(qiov->iov);
+    g_free(qiov->iov);
 }
 
 void qemu_iovec_reset(QEMUIOVector *qiov)