package/cairomm: add license hash

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/cairomm/cairomm.hash

@@ -1,2 +1,4 @@
 # From http://ftp.gnome.org/pub/gnome/sources/cairomm/1.12/cairomm-1.12.0.sha256sum
 sha256	a54ada8394a86182525c0762e6f50db6b9212a2109280d13ec6a0b29bfd1afe6	cairomm-1.12.0.tar.xz
+# Locally computed
+sha256 bfe4a52dc4645385f356a8e83cc54216a293e3b6f1cb4f79f5fc0277abf937fd  COPYING