Fix metadata for liba52

Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>

meta/packages/liba52/liba52_0.7.4.bb

@@ -1,5 +1,8 @@
 DESCRIPTION = "Library for reading some sort of media format."
-LICENSE = "GPL"
+HOMEPAGE = "http://liba52.sourceforge.net/"
+LICENSE = "GPLv2+"
+LIC_FILES_CHKSUM = "file://COPYING;md5=0636e73ff0215e8d672dc4c32c317bb3 \
+			file://include/a52.h;beginline=1;endline=12;md5=81152ceb3562bf20a60d1b6018175dd1"
 SECTION = "libs"
 PRIORITY = "optional"
 PR = "r2"