pixman: add hash file

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/pixman/pixman.hash

@@ -0,0 +1,2 @@
+# From http://cairographics.org/releases/pixman-0.32.6.tar.gz.sha1
+sha1	8791343cbf6d99451f4d08e8209d6ac11bf96df2	pixman-0.32.6.tar.gz