package/tinyxml: add missing hash for README file

Signed-off-by: Nicolas Carrier <nicolas.carrier@orolia.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/tinyxml/tinyxml.hash

@@ -1,2 +1,3 @@
 # Locally calculated
 sha256	8164c9ad48b9028667768a584d62f7760cfbfb90d0dd6214ad174403058da10c	tinyxml-2.6.2_2.tar.gz
+sha256	a65b8363834ccbe31ab7b49dcba723ed204622df30326793e0121435624c1a8d	README