pixman: add licensing info

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

qemu-pixman.c

diff --git a/qemu-pixman.c b/qemu-pixman.c
index 7547ed7..063b52d 100644
--- a/qemu-pixman.c
+++ b/qemu-pixman.c
@@ -1,3 +1,8 @@
+/*
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
 #include "qemu-pixman.h"
 
 int qemu_pixman_get_type(int rshift, int gshift, int bshift)

qemu-pixman.h

diff --git a/qemu-pixman.h b/qemu-pixman.h
index 7652c41..783a392 100644
--- a/qemu-pixman.h
+++ b/qemu-pixman.h
@@ -1,3 +1,8 @@
+/*
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
 #ifndef QEMU_PIXMAN_H
 #define QEMU_PIXMAN_H